ルール更新 (#224)

rules/sigma/powershell/powershell_script/powershell_accessing_win_api.yml

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+
+title: Accessing WinAPI in PowerShell
+author: Nikita Nazarov, oscd.community
+date: 2020/10/06
+description: Detecting use WinAPI Functions in PowerShell
+detection:
+  SELECTION_1:
+    ScriptBlockText:
+    - '*WaitForSingleObject*'
+    - '*QueueUserApc*'
+    - '*RtlCreateUserThread*'
+    - '*OpenProcess*'
+    - '*VirtualAlloc*'
+    - '*VirtualFree*'
+    - '*WriteProcessMemory*'
+    - '*CreateUserThread*'
+    - '*CloseHandle*'
+    - '*GetDelegateForFunctionPointer*'
+    - '*CreateThread*'
+    - '*memcpy*'
+    - '*LoadLibrary*'
+    - '*GetModuleHandle*'
+    - '*GetProcAddress*'
+    - '*VirtualProtect*'
+    - '*FreeLibrary*'
+    - '*ReadProcessMemory*'
+    - '*CreateRemoteThread*'
+    - '*AdjustTokenPrivileges*'
+    - '*WriteByte*'
+    - '*WriteInt32*'
+    - '*OpenThreadToken*'
+    - '*PtrToString*'
+    - '*FreeHGlobal*'
+    - '*ZeroFreeGlobalAllocUnicode*'
+    - '*OpenProcessToken*'
+    - '*GetTokenInformation*'
+    - '*SetThreadToken*'
+    - '*ImpersonateLoggedOnUser*'
+    - '*RevertToSelf*'
+    - '*GetLogonSessionData*'
+    - '*CreateProcessWithToken*'
+    - '*DuplicateTokenEx*'
+    - '*OpenWindowStation*'
+    - '*OpenDesktop*'
+    - '*MiniDumpWriteDump*'
+    - '*AddSecurityPackage*'
+    - '*EnumerateSecurityPackages*'
+    - '*GetProcessHandle*'
+    - '*DangerousGetHandle*'
+    - '*kernel32*'
+    - '*Advapi32*'
+    - '*msvcrt*'
+    - '*ntdll*'
+    - '*user32*'
+    - '*secur32*'
+  condition: SELECTION_1
+falsepositives:
+- Carbon PowerShell Module (https://github.com/webmd-health-services/Carbon)
+id: 03d83090-8cba-44a0-b02f-0b756a050306
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://speakerdeck.com/heirhabarov/hunting-for-powershell-abuse
+status: experimental
+tags:
+- attack.execution
+- attack.t1059.001
+- attack.t1106

rules/sigma/powershell/powershell_script/powershell_adrecon_execution.yml

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+
+title: PowerShell ADRecon Execution
+author: Bhabesh Raj
+date: 2021/07/16
+description: Detects execution of ADRecon.ps1 for AD reconnaissance which has been
+  reported to be actively used by FIN7
+detection:
+  SELECTION_1:
+    ScriptBlockText:
+    - '*Function Get-ADRExcelComOb*'
+    - '*ADRecon-Report.xlsx*'
+  condition: SELECTION_1
+falsepositives:
+- Unknown
+id: bf72941a-cba0-41ea-b18c-9aca3925690d
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/sense-of-security/ADRecon
+- https://bi-zone.medium.com/from-pentest-to-apt-attack-cybercriminal-group-fin7-disguises-its-malware-as-an-ethical-hackers-c23c9a75e319
+status: experimental
+tags:
+- attack.discovery
+- attack.execution
+- attack.t1059.001

rules/sigma/powershell/powershell_script/powershell_automated_collection.yml

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+
+title: Automated Collection Command PowerShell
+author: frack113
+date: 2021/07/28
+description: Once established within a system or network, an adversary may use automated
+  techniques for collecting internal data.
+detection:
+  SELECTION_1:
+    ScriptBlockText:
+    - '*.doc*'
+    - '*.docx*'
+    - '*.xls*'
+    - '*.xlsx*'
+    - '*.ppt*'
+    - '*.pptx*'
+    - '*.rtf*'
+    - '*.pdf*'
+    - '*.txt*'
+  SELECTION_2:
+    ScriptBlockText: '*Get-ChildItem*'
+  SELECTION_3:
+    ScriptBlockText: '* -Recurse *'
+  SELECTION_4:
+    ScriptBlockText: '* -Include *'
+  condition: (SELECTION_1 and SELECTION_2 and SELECTION_3 and SELECTION_4)
+falsepositives:
+- Unknown
+id: c1dda054-d638-4c16-afc8-53e007f3fbc5
+level: medium
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1119/T1119.md
+status: experimental
+tags:
+- attack.collection
+- attack.t1119

rules/sigma/powershell/powershell_script/powershell_azurehound_commands.yml

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+
+title: AzureHound PowerShell Commands
+author: Austin Songer (@austinsonger)
+date: 2021/10/23
+description:
+detection:
+  SELECTION_1:
+    ScriptBlockText:
+    - '*Invoke-AzureHound*'
+  condition: SELECTION_1
+falsepositives:
+- Penetration testing
+id: 83083ac6-1816-4e76-97d7-59af9a9ae46e
+level: high
+logsource:
+  category: ps_script
+  definition: Script Block Logging must be enable
+  product: windows
+references:
+- https://github.com/BloodHoundAD/BloodHound/blob/master/Collectors/AzureHound.ps1
+- https://bloodhound.readthedocs.io/en/latest/data-collection/azurehound.html
+status: experimental
+tags:
+- attack.discovery
+- attack.t1482
+- attack.t1087
+- attack.t1087.001
+- attack.t1087.002
+- attack.t1069.001
+- attack.t1069.002
+- attack.t1069

rules/sigma/powershell/powershell_script/powershell_cl_invocation_lolscript.yml

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+
+title: Execution via CL_Invocation.ps1
+author: oscd.community, Natalia Shornikova
+date: 2020/10/14
+description: Detects Execution via SyncInvoke in CL_Invocation.ps1 module
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*CL_Invocation.ps1*'
+  SELECTION_2:
+    ScriptBlockText: '*SyncInvoke*'
+  condition: (SELECTION_1 and SELECTION_2)
+falsepositives:
+- Unknown
+id: 4cd29327-685a-460e-9dac-c3ab96e549dc
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/LOLBAS-Project/LOLBAS/blob/master/yml/OSScripts/Cl_invocation.yml
+- https://twitter.com/bohops/status/948061991012327424
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1216

rules/sigma/powershell/powershell_script/powershell_cl_invocation_lolscript_count.yml

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+
+title: Execution via CL_Invocation.ps1 (2 Lines)
+author: oscd.community, Natalia Shornikova
+date: 2020/10/14
+description: Detects Execution via SyncInvoke in CL_Invocation.ps1 module
+detection:
+  SELECTION_1:
+    ScriptBlockText:
+    - '*CL_Invocation.ps1*'
+    - '*SyncInvoke*'
+  condition: SELECTION_1 | count(ScriptBlockText) by Computer > 2
+falsepositives:
+- Unknown
+id: f588e69b-0750-46bb-8f87-0e9320d57536
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/LOLBAS-Project/LOLBAS/blob/master/yml/OSScripts/Cl_invocation.yml
+- https://twitter.com/bohops/status/948061991012327424
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1216

rules/sigma/powershell/powershell_script/powershell_cl_mutexverifiers_lolscript.yml

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+
+title: Execution via CL_Mutexverifiers.ps1
+author: oscd.community, Natalia Shornikova
+date: 2020/10/14
+description: Detects Execution via runAfterCancelProcess in CL_Mutexverifiers.ps1
+  module
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*CL_Mutexverifiers.ps1*'
+  SELECTION_2:
+    ScriptBlockText: '*runAfterCancelProcess*'
+  condition: (SELECTION_1 and SELECTION_2)
+falsepositives:
+- Unknown
+id: 39776c99-1c7b-4ba0-b5aa-641525eee1a4
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/LOLBAS-Project/LOLBAS/blob/master/yml/OSScripts/CL_mutexverifiers.yml
+- https://twitter.com/pabraeken/status/995111125447577600
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1216

rules/sigma/powershell/powershell_script/powershell_cl_mutexverifiers_lolscript_count.yml

@@ -0,0 +1,28 @@
+
+title: Execution via CL_Mutexverifiers.ps1 (2 Lines)
+author: oscd.community, Natalia Shornikova
+date: 2020/10/14
+description: Detects Execution via runAfterCancelProcess in CL_Mutexverifiers.ps1
+  module
+detection:
+  SELECTION_1:
+    ScriptBlockText:
+    - '*CL_Mutexverifiers.ps1*'
+    - '*runAfterCancelProcess*'
+  condition: SELECTION_1 | count(ScriptBlockText) by Computer > 2
+falsepositives:
+- Unknown
+id: 6609c444-9670-4eab-9636-fe4755a851ce
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/LOLBAS-Project/LOLBAS/blob/master/yml/OSScripts/CL_mutexverifiers.yml
+- https://twitter.com/pabraeken/status/995111125447577600
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1216

rules/sigma/powershell/powershell_script/powershell_create_local_user.yml

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+
+title: PowerShell Create Local User
+author: '@ROxPinTeddy'
+date: 2020/04/11
+description: Detects creation of a local user via PowerShell
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*New-LocalUser*'
+  condition: SELECTION_1
+falsepositives:
+- Legitimate user creation
+id: 243de76f-4725-4f2e-8225-a8a69b15ad61
+level: medium
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1136/T1136.md
+status: experimental
+tags:
+- attack.execution
+- attack.t1059.001
+- attack.t1086
+- attack.persistence
+- attack.t1136.001
+- attack.t1136

rules/sigma/powershell/powershell_script/powershell_data_compressed.yml

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+
+title: Data Compressed - PowerShell
+author: Timur Zinniatullin, oscd.community
+date: 2019/10/21
+description: An adversary may compress data (e.g., sensitive documents) that is collected
+  prior to exfiltration in order to make it portable and minimize the amount of data
+  sent over the network.
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*-Recurse*'
+  SELECTION_2:
+    ScriptBlockText: '*|*'
+  SELECTION_3:
+    ScriptBlockText: '*Compress-Archive*'
+  condition: (SELECTION_1 and SELECTION_2 and SELECTION_3)
+falsepositives:
+- Highly likely if archive operations are done via PowerShell.
+id: 6dc5d284-69ea-42cf-9311-fb1c3932a69a
+level: low
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1560/T1560.md
+status: experimental
+tags:
+- attack.exfiltration
+- attack.t1560
+- attack.t1002

rules/sigma/powershell/powershell_script/powershell_detect_vm_env.yml

@@ -0,0 +1,32 @@
+
+title: Powershell Detect Virtualization Environment
+author: frack113
+date: 2021/08/03
+description: Adversaries may employ various system checks to detect and avoid virtualization
+  and analysis environments. This may include changing behaviors based on the results
+  of checks for the presence of artifacts indicative of a virtual machine environment
+  (VME) or sandbox
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*Get-WmiObject*'
+  SELECTION_2:
+    ScriptBlockText:
+    - '*MSAcpi_ThermalZoneTemperature*'
+    - '*Win32_ComputerSystem*'
+  condition: (SELECTION_1 and SELECTION_2)
+falsepositives:
+- Unknown
+id: d93129cd-1ee0-479f-bc03-ca6f129882e3
+level: medium
+logsource:
+  category: ps_script
+  definition: EnableScriptBlockLogging must be set to enable
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1497.001/T1497.001.md
+- https://techgenix.com/malicious-powershell-scripts-evade-detection/
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1497.001

rules/sigma/powershell/powershell_script/powershell_dnscat_execution.yml

@@ -0,0 +1,25 @@
+
+title: Dnscat Execution
+author: Daniil Yugoslavskiy, oscd.community
+date: 2019/10/24
+description: Dnscat exfiltration tool execution
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*Start-Dnscat2*'
+  condition: SELECTION_1
+falsepositives:
+- Legitimate usage of PowerShell Dnscat2 — DNS Exfiltration tool (unlikely)
+id: a6d67db4-6220-436d-8afc-f3842fe05d43
+level: critical
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+status: experimental
+tags:
+- attack.exfiltration
+- attack.t1048
+- attack.execution
+- attack.t1059.001
+- attack.t1086

rules/sigma/powershell/powershell_script/powershell_icmp_exfiltration.yml

@@ -0,0 +1,30 @@
+
+title: PowerShell ICMP Exfiltration
+author: Bartlomiej Czyz @bczyz1, oscd.community
+date: 2020/10/10
+description: Detects Exfiltration Over Alternative Protocol - ICMP. Adversaries may
+  steal data by exfiltrating it over an un-encrypted network protocol other than that
+  of the existing command and control channel.
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*New-Object*'
+  SELECTION_2:
+    ScriptBlockText: '*System.Net.NetworkInformation.Ping*'
+  SELECTION_3:
+    ScriptBlockText: '*.Send(*'
+  condition: (SELECTION_1 and SELECTION_2 and SELECTION_3)
+falsepositives:
+- Legitimate usage of System.Net.NetworkInformation.Ping class
+id: 4c4af3cd-2115-479c-8193-6b8bfce9001c
+level: medium
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1048.003/T1048.003.md#atomic-test-2---exfiltration-over-alternative-protocol---icmp
+status: experimental
+tags:
+- attack.exfiltration
+- attack.t1048.003

rules/sigma/powershell/powershell_script/powershell_invoke_nightmare.yml

@@ -0,0 +1,24 @@
+
+title: PrintNightmare Powershell Exploitation
+author: Max Altgelt, Tobias Michalski
+date: 2021/08/09
+description: Detects Commandlet name for PrintNightmare exploitation.
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*Invoke-Nightmare*'
+  condition: SELECTION_1
+falsepositives:
+- Unknown
+id: 6d3f1399-a81c-4409-aff3-1ecfe9330baf
+level: high
+logsource:
+  category: ps_script
+  definition: Script Block Logging must be enable
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/calebstewart/CVE-2021-1675
+status: test
+tags:
+- attack.privilege_escalation
+- attack.t1548

rules/sigma/powershell/powershell_script/powershell_invoke_obfuscation_clip_in_scriptblocktext.yml

@@ -0,0 +1,26 @@
+
+title: Invoke-Obfuscation CLIP+ Launcher
+author: Jonathan Cheong, oscd.community
+date: 2020/10/13
+description: Detects Obfuscated use of Clip.exe to execute PowerShell
+detection:
+  SELECTION_1:
+    ScriptBlockText|re: .*cmd.{0,5}(?:/c|/r).+clip(?:\.exe)?.{0,4}&&.+clipboard]::\(\s\\"\{\d\}.+\-f.+"
+  condition: SELECTION_1
+falsepositives:
+- Unknown
+id: 73e67340-0d25-11eb-adc1-0242ac120002
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/Neo23x0/sigma/issues/1009
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1027
+- attack.execution
+- attack.t1059.001

rules/sigma/powershell/powershell_script/powershell_invoke_obfuscation_obfuscated_iex_in_scriptblocktext.yml

@@ -0,0 +1,39 @@
+
+title: Invoke-Obfuscation Obfuscated IEX Invocation
+author: Daniel Bohannon (@Mandiant/@FireEye), oscd.community
+date: 2019/11/08
+description: Detects all variations of obfuscated powershell IEX invocation code generated
+  by Invoke-Obfuscation framework from the following code block — https://github.com/danielbohannon/Invoke-Obfuscation/blob/master/Out-ObfuscatedStringCommand.ps1#L873-L888
+detection:
+  SELECTION_1:
+    ScriptBlockText|re: \$PSHome\[\s*\d{1,3}\s*\]\s*\+\s*\$PSHome\[
+  SELECTION_2:
+    ScriptBlockText|re: \$ShellId\[\s*\d{1,3}\s*\]\s*\+\s*\$ShellId\[
+  SELECTION_3:
+    ScriptBlockText|re: \$env:Public\[\s*\d{1,3}\s*\]\s*\+\s*\$env:Public\[
+  SELECTION_4:
+    ScriptBlockText|re: \$env:ComSpec\[(\s*\d{1,3}\s*,){2}
+  SELECTION_5:
+    ScriptBlockText|re: \\\\*mdr\\\\*\W\s*\)\.Name
+  SELECTION_6:
+    ScriptBlockText|re: \$VerbosePreference\.ToString\(
+  SELECTION_7:
+    ScriptBlockText|re: \String\]\s*\$VerbosePreference
+  condition: (SELECTION_1 or SELECTION_2 or SELECTION_3 or SELECTION_4 or SELECTION_5
+    or SELECTION_6 or SELECTION_7)
+falsepositives:
+- Unknown
+id: 1b9dc62e-6e9e-42a3-8990-94d7a10007f7
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1027
+- attack.execution
+- attack.t1059.001
+- attack.t1086

rules/sigma/powershell/powershell_script/powershell_invoke_obfuscation_stdin_in_scriptblocktext.yml

@@ -0,0 +1,26 @@
+
+title: Invoke-Obfuscation STDIN+ Launcher
+author: Jonathan Cheong, oscd.community
+date: 2020/10/15
+description: Detects Obfuscated use of stdin to execute PowerShell
+detection:
+  SELECTION_1:
+    ScriptBlockText|re: .*cmd.{0,5}(?:/c|/r).+powershell.+(?:\$\{?input\}?|noexit).+"
+  condition: SELECTION_1
+falsepositives:
+- Unknown
+id: 779c8c12-0eb1-11eb-adc1-0242ac120002
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/Neo23x0/sigma/issues/1009
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1027
+- attack.execution
+- attack.t1059.001

rules/sigma/powershell/powershell_script/powershell_invoke_obfuscation_var_in_scriptblocktext.yml

@@ -0,0 +1,26 @@
+
+title: Invoke-Obfuscation VAR+ Launcher
+author: Jonathan Cheong, oscd.community
+date: 2020/10/15
+description: Detects Obfuscated use of Environment Variables to execute PowerShell
+detection:
+  SELECTION_1:
+    ScriptBlockText|re: .*cmd.{0,5}(?:/c|/r)(?:\s|)"set\s[a-zA-Z]{3,6}.*(?:\{\d\}){1,}\\"\s+?\-f(?:.*\)){1,}.*"
+  condition: SELECTION_1
+falsepositives:
+- Unknown
+id: 0adfbc14-0ed1-11eb-adc1-0242ac120002
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/Neo23x0/sigma/issues/1009
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1027
+- attack.execution
+- attack.t1059.001

rules/sigma/powershell/powershell_script/powershell_invoke_obfuscation_via_compress_in_scriptblocktext.yml

@@ -0,0 +1,26 @@
+
+title: Invoke-Obfuscation COMPRESS OBFUSCATION
+author: Timur Zinniatullin, oscd.community
+date: 2020/10/18
+description: Detects Obfuscated Powershell via COMPRESS OBFUSCATION
+detection:
+  SELECTION_1:
+    ScriptBlockText|re: (?i).*new-object.*(?:system\.io\.compression\.deflatestream|system\.io\.streamreader).*text\.encoding\]::ascii.*readtoend
+  condition: SELECTION_1
+falsepositives:
+- unknown
+id: 20e5497e-331c-4cd5-8d36-935f6e2a9a07
+level: medium
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/Neo23x0/sigma/issues/1009
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1027
+- attack.execution
+- attack.t1059.001

rules/sigma/powershell/powershell_script/powershell_invoke_obfuscation_via_rundll_in_scriptblocktext.yml

@@ -0,0 +1,26 @@
+
+title: Invoke-Obfuscation RUNDLL LAUNCHER
+author: Timur Zinniatullin, oscd.community
+date: 2020/10/18
+description: Detects Obfuscated Powershell via RUNDLL LAUNCHER
+detection:
+  SELECTION_1:
+    ScriptBlockText|re: (?i).*rundll32(?:\.exe)?(?:\s+)?shell32\.dll.*shellexec_rundll.*powershell.*"
+  condition: SELECTION_1
+falsepositives:
+- Unknown
+id: e6cb92b4-b470-4eb8-8a9d-d63e8583aae0
+level: medium
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/Neo23x0/sigma/issues/1009
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1027
+- attack.execution
+- attack.t1059.001

rules/sigma/powershell/powershell_script/powershell_invoke_obfuscation_via_stdin_in_scriptblocktext.yml

@@ -0,0 +1,26 @@
+
+title: Invoke-Obfuscation Via Stdin
+author: Nikita Nazarov, oscd.community
+date: 2020/10/12
+description: Detects Obfuscated Powershell via Stdin in Scripts
+detection:
+  SELECTION_1:
+    ScriptBlockText|re: (?i).*(set).*&&\s?set.*(environment|invoke|\$\{?input).*&&.*"
+  condition: SELECTION_1
+falsepositives:
+- Unknown
+id: 86b896ba-ffa1-4fea-83e3-ee28a4c915c7
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/Neo23x0/sigma/issues/1009
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1027
+- attack.execution
+- attack.t1059.001

rules/sigma/powershell/powershell_script/powershell_invoke_obfuscation_via_use_clip_in_scriptblocktext.yml

@@ -0,0 +1,26 @@
+
+title: Invoke-Obfuscation Via Use Clip
+author: Nikita Nazarov, oscd.community
+date: 2020/10/09
+description: Detects Obfuscated Powershell via use Clip.exe in Scripts
+detection:
+  SELECTION_1:
+    ScriptBlockText|re: (?i).*?echo.*clip.*&&.*(Clipboard|i`?n`?v`?o`?k`?e`?).*
+  condition: SELECTION_1
+falsepositives:
+- Unknown
+id: db92dd33-a3ad-49cf-8c2c-608c3e30ace0
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/Neo23x0/sigma/issues/1009
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1027
+- attack.execution
+- attack.t1059.001

rules/sigma/powershell/powershell_script/powershell_invoke_obfuscation_via_use_mhsta_in_scriptblocktext.yml

@@ -0,0 +1,26 @@
+
+title: Invoke-Obfuscation Via Use MSHTA
+author: Nikita Nazarov, oscd.community
+date: 2020/10/08
+description: Detects Obfuscated Powershell via use MSHTA in Scripts
+detection:
+  SELECTION_1:
+    ScriptBlockText|re: (?i).*(set).*(&&).*(mshta).*(vbscript:createobject).*(\.run).*\(window\.close\).*"
+  condition: SELECTION_1
+falsepositives:
+- Unknown
+id: e55a5195-4724-480e-a77e-3ebe64bd3759
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/Neo23x0/sigma/issues/1009
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1027
+- attack.execution
+- attack.t1059.001

rules/sigma/powershell/powershell_script/powershell_invoke_obfuscation_via_use_rundll32_in_scriptblocktext.yml

@@ -0,0 +1,26 @@
+
+title: Invoke-Obfuscation Via Use Rundll32
+author: Nikita Nazarov, oscd.community
+date: 2019/10/08
+description: Detects Obfuscated Powershell via use Rundll32 in Scripts
+detection:
+  SELECTION_1:
+    ScriptBlockText|re: (?i).*&&.*rundll32.*shell32\.dll.*shellexec_rundll.*(value|invoke|comspec|iex).*"
+  condition: SELECTION_1
+falsepositives:
+- Unknown
+id: a5a30a6e-75ca-4233-8b8c-42e0f2037d3b
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/Neo23x0/sigma/issues/1009
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1027
+- attack.execution
+- attack.t1059.001

rules/sigma/powershell/powershell_script/powershell_invoke_obfuscation_via_var_in_scriptblocktext.yml

@@ -0,0 +1,26 @@
+
+title: Invoke-Obfuscation VAR++ LAUNCHER OBFUSCATION
+author: Timur Zinniatullin, oscd.community
+date: 2020/10/13
+description: Detects Obfuscated Powershell via VAR++ LAUNCHER
+detection:
+  SELECTION_1:
+    ScriptBlockText|re: (?i).*&&set.*(\{\d\}){2,}\\"\s+?\-f.*&&.*cmd.*/c
+  condition: SELECTION_1
+falsepositives:
+- Unknown
+id: e54f5149-6ba3-49cf-b153-070d24679126
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/Neo23x0/sigma/issues/1009
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1027
+- attack.execution
+- attack.t1059.001

rules/sigma/powershell/powershell_script/powershell_keylogging.yml

@@ -0,0 +1,30 @@
+
+title: Powershell Keylogging
+author: frack113
+date: 2021/07/30
+description: Adversaries may log user keystrokes to intercept credentials as the user
+  types them.
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*Get-Keystrokes*'
+  SELECTION_2:
+    ScriptBlockText: '*Get-ProcAddress user32.dll GetAsyncKeyState*'
+  SELECTION_3:
+    ScriptBlockText: '*Get-ProcAddress user32.dll GetForegroundWindow*'
+  condition: (SELECTION_1 or (SELECTION_2 and SELECTION_3))
+falsepositives:
+- Unknown
+id: 34f90d3c-c297-49e9-b26d-911b05a4866c
+level: medium
+logsource:
+  category: ps_script
+  definition: EnableScriptBlockLogging must be set to enable
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1218/T1218.md
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1056.001/src/Get-Keystrokes.ps1
+status: experimental
+tags:
+- attack.collection
+- attack.t1056.001

rules/sigma/powershell/powershell_script/powershell_malicious_commandlets.yml

@@ -0,0 +1,123 @@
+
+title: Malicious PowerShell Commandlets
+author: Sean Metcalf (source), Florian Roth (rule), Bartlomiej Czyz @bczyz1 (update),
+  oscd.community (update)
+date: 2017/03/05
+description: Detects Commandlet names from well-known PowerShell exploitation frameworks
+detection:
+  SELECTION_1:
+    ScriptBlockText:
+    - '*Invoke-DllInjection*'
+    - '*Invoke-Shellcode*'
+    - '*Invoke-WmiCommand*'
+    - '*Get-GPPPassword*'
+    - '*Get-Keystrokes*'
+    - '*Get-TimedScreenshot*'
+    - '*Get-VaultCredential*'
+    - '*Invoke-CredentialInjection*'
+    - '*Invoke-Mimikatz*'
+    - '*Invoke-NinjaCopy*'
+    - '*Invoke-TokenManipulation*'
+    - '*Out-Minidump*'
+    - '*VolumeShadowCopyTools*'
+    - '*Invoke-ReflectivePEInjection*'
+    - '*Invoke-UserHunter*'
+    - '*Find-GPOLocation*'
+    - '*Invoke-ACLScanner*'
+    - '*Invoke-DowngradeAccount*'
+    - '*Get-ServiceUnquoted*'
+    - '*Get-ServiceFilePermission*'
+    - '*Get-ServicePermission*'
+    - '*Invoke-ServiceAbuse*'
+    - '*Install-ServiceBinary*'
+    - '*Get-RegAutoLogon*'
+    - '*Get-VulnAutoRun*'
+    - '*Get-VulnSchTask*'
+    - '*Get-UnattendedInstallFile*'
+    - '*Get-ApplicationHost*'
+    - '*Get-RegAlwaysInstallElevated*'
+    - '*Get-Unconstrained*'
+    - '*Add-RegBackdoor*'
+    - '*Add-ScrnSaveBackdoor*'
+    - '*Gupt-Backdoor*'
+    - '*Invoke-ADSBackdoor*'
+    - '*Enabled-DuplicateToken*'
+    - '*Invoke-PsUaCme*'
+    - '*Remove-Update*'
+    - '*Check-VM*'
+    - '*Get-LSASecret*'
+    - '*Get-PassHashes*'
+    - '*Show-TargetScreen*'
+    - '*Port-Scan*'
+    - '*Invoke-PoshRatHttp*'
+    - '*Invoke-PowerShellTCP*'
+    - '*Invoke-PowerShellWMI*'
+    - '*Add-Exfiltration*'
+    - '*Add-Persistence*'
+    - '*Do-Exfiltration*'
+    - '*Start-CaptureServer*'
+    - '*Get-ChromeDump*'
+    - '*Get-ClipboardContents*'
+    - '*Get-FoxDump*'
+    - '*Get-IndexedItem*'
+    - '*Get-Screenshot*'
+    - '*Invoke-Inveigh*'
+    - '*Invoke-NetRipper*'
+    - '*Invoke-EgressCheck*'
+    - '*Invoke-PostExfil*'
+    - '*Invoke-PSInject*'
+    - '*Invoke-RunAs*'
+    - '*MailRaider*'
+    - '*New-HoneyHash*'
+    - '*Set-MacAttribute*'
+    - '*Invoke-DCSync*'
+    - '*Invoke-PowerDump*'
+    - '*Exploit-Jboss*'
+    - '*Invoke-ThunderStruck*'
+    - '*Invoke-VoiceTroll*'
+    - '*Set-Wallpaper*'
+    - '*Invoke-InveighRelay*'
+    - '*Invoke-PsExec*'
+    - '*Invoke-SSHCommand*'
+    - '*Get-SecurityPackages*'
+    - '*Install-SSP*'
+    - '*Invoke-BackdoorLNK*'
+    - '*PowerBreach*'
+    - '*Get-SiteListPassword*'
+    - '*Get-System*'
+    - '*Invoke-BypassUAC*'
+    - '*Invoke-Tater*'
+    - '*Invoke-WScriptBypassUAC*'
+    - '*PowerUp*'
+    - '*PowerView*'
+    - '*Get-RickAstley*'
+    - '*Find-Fruit*'
+    - '*HTTP-Login*'
+    - '*Find-TrustedDocuments*'
+    - '*Invoke-Paranoia*'
+    - '*Invoke-WinEnum*'
+    - '*Invoke-ARPScan*'
+    - '*Invoke-PortScan*'
+    - '*Invoke-ReverseDNSLookup*'
+    - '*Invoke-SMBScanner*'
+    - '*Invoke-Mimikittenz*'
+    - '*Invoke-AllChecks*'
+  SELECTION_2:
+    ScriptBlockText: '*Get-SystemDriveInfo*'
+  condition: (SELECTION_1 and  not (SELECTION_2))
+falsepositives:
+- Penetration testing
+id: 89819aa4-bbd6-46bc-88ec-c7f7fe30efa6
+level: high
+logsource:
+  category: ps_script
+  definition: Script Block Logging must be enable
+  product: windows
+modified: 2021/10/16
+references:
+- https://adsecurity.org/?p=2921
+status: experimental
+tags:
+- attack.execution
+- attack.t1059.001
+- attack.t1086

rules/sigma/powershell/powershell_script/powershell_malicious_keywords.yml

@@ -0,0 +1,46 @@
+
+title: Malicious PowerShell Keywords
+author: Sean Metcalf (source), Florian Roth (rule)
+date: 2017/03/05
+description: Detects keywords from well-known PowerShell exploitation frameworks
+detection:
+  SELECTION_1:
+    ScriptBlockText:
+    - '*AdjustTokenPrivileges*'
+    - '*IMAGE_NT_OPTIONAL_HDR64_MAGIC*'
+    - '*Microsoft.Win32.UnsafeNativeMethods*'
+    - '*ReadProcessMemory.Invoke*'
+    - '*SE_PRIVILEGE_ENABLED*'
+    - '*LSA_UNICODE_STRING*'
+    - '*MiniDumpWriteDump*'
+    - '*PAGE_EXECUTE_READ*'
+    - '*SECURITY_DELEGATION*'
+    - '*TOKEN_ADJUST_PRIVILEGES*'
+    - '*TOKEN_ALL_ACCESS*'
+    - '*TOKEN_ASSIGN_PRIMARY*'
+    - '*TOKEN_DUPLICATE*'
+    - '*TOKEN_ELEVATION*'
+    - '*TOKEN_IMPERSONATE*'
+    - '*TOKEN_INFORMATION_CLASS*'
+    - '*TOKEN_PRIVILEGES*'
+    - '*TOKEN_QUERY*'
+    - '*Metasploit*'
+    - '*Mimikatz*'
+  condition: SELECTION_1
+falsepositives:
+- Penetration tests
+id: f62176f3-8128-4faa-bf6c-83261322e5eb
+level: high
+logsource:
+  category: ps_script
+  definition: It is recommended to use the new "Script Block Logging" of PowerShell
+    v5 https://adsecurity.org/?p=2277
+  product: windows
+modified: 2021/10/16
+references:
+- https://adsecurity.org/?p=2921
+status: experimental
+tags:
+- attack.execution
+- attack.t1059.001
+- attack.t1086

rules/sigma/powershell/powershell_script/powershell_memorydump_getstoragediagnosticinfo.yml

@@ -0,0 +1,26 @@
+
+title: Live Memory Dump Using Powershell
+author: Max Altgelt
+date: 2021/09/21
+description: Detects usage of a PowerShell command to dump the live memory of a Windows
+  machine
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*Get-StorageDiagnosticInfo*'
+  SELECTION_2:
+    ScriptBlockText: '*-IncludeLiveDump*'
+  condition: (SELECTION_1 and SELECTION_2)
+falsepositives:
+- Diagnostics
+id: cd185561-4760-45d6-a63e-a51325112cae
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://docs.microsoft.com/en-us/powershell/module/storage/get-storagediagnosticinfo
+status: experimental
+tags:
+- attack.t1003

rules/sigma/powershell/powershell_script/powershell_nishang_malicious_commandlets.yml

@@ -0,0 +1,96 @@
+
+title: Malicious Nishang PowerShell Commandlets
+author: Alec Costello
+date: 2019/05/16
+description: Detects Commandlet names and arguments from the Nishang exploitation
+  framework
+detection:
+  SELECTION_1:
+    ScriptBlockText:
+    - '*Add-ConstrainedDelegationBackdoor*'
+    - '*Set-DCShadowPermissions*'
+    - '*DNS_TXT_Pwnage*'
+    - '*Execute-OnTime*'
+    - '*HTTP-Backdoor*'
+    - '*Set-RemotePSRemoting*'
+    - '*Set-RemoteWMI*'
+    - '*Invoke-AmsiBypass*'
+    - '*Out-CHM*'
+    - '*Out-HTA*'
+    - '*Out-SCF*'
+    - '*Out-SCT*'
+    - '*Out-Shortcut*'
+    - '*Out-WebQuery*'
+    - '*Out-Word*'
+    - '*Enable-Duplication*'
+    - '*Remove-Update*'
+    - '*Download-Execute-PS*'
+    - '*Download_Execute*'
+    - '*Execute-Command-MSSQL*'
+    - '*Execute-DNSTXT-Code*'
+    - '*Out-RundllCommand*'
+    - '*Copy-VSS*'
+    - '*FireBuster*'
+    - '*FireListener*'
+    - '*Get-Information*'
+    - '*Get-PassHints*'
+    - '*Get-WLAN-Keys*'
+    - '*Get-Web-Credentials*'
+    - '*Invoke-CredentialsPhish*'
+    - '*Invoke-MimikatzWDigestDowngrade*'
+    - '*Invoke-SSIDExfil*'
+    - '*Invoke-SessionGopher*'
+    - '*Keylogger*'
+    - '*Invoke-Interceptor*'
+    - '*Create-MultipleSessions*'
+    - '*Invoke-NetworkRelay*'
+    - '*Run-EXEonRemote*'
+    - '*Invoke-Prasadhak*'
+    - '*Invoke-BruteForce*'
+    - '*Password-List*'
+    - '*Invoke-JSRatRegsvr*'
+    - '*Invoke-JSRatRundll*'
+    - '*Invoke-PoshRatHttps*'
+    - '*Invoke-PowerShellIcmp*'
+    - '*Invoke-PowerShellUdp*'
+    - '*Invoke-PSGcat*'
+    - '*Invoke-PsGcatAgent*'
+    - '*Remove-PoshRat*'
+    - '*Add-Persistance*'
+    - '*ExetoText*'
+    - '*Invoke-Decode*'
+    - '*Invoke-Encode*'
+    - '*Parse_Keys*'
+    - '*Remove-Persistence*'
+    - '*StringtoBase64*'
+    - '*TexttoExe*'
+    - '*Powerpreter*'
+    - '*Nishang*'
+    - '*DataToEncode*'
+    - '*LoggedKeys*'
+    - '*OUT-DNSTXT*'
+    - '*ExfilOption*'
+    - '*DumpCerts*'
+    - '*DumpCreds*'
+    - '*Shellcode32*'
+    - '*Shellcode64*'
+    - '*NotAllNameSpaces*'
+    - '*exfill*'
+    - '*FakeDC*'
+  condition: SELECTION_1
+falsepositives:
+- Penetration testing
+id: f772cee9-b7c2-4cb2-8f07-49870adc02e0
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/samratashok/nishang
+status: experimental
+tags:
+- attack.execution
+- attack.t1059.001
+- attack.t1086

rules/sigma/powershell/powershell_script/powershell_ntfs_ads_access.yml

@@ -0,0 +1,35 @@
+
+title: NTFS Alternate Data Stream
+author: Sami Ruohonen
+date: 2018/07/24
+description: Detects writing data into NTFS alternate data streams from powershell.
+  Needs Script Block Logging.
+detection:
+  SELECTION_1:
+    ScriptBlockText:
+    - '*set-content*'
+    - '*add-content*'
+  SELECTION_2:
+    ScriptBlockText:
+    - '*-stream*'
+  condition: (SELECTION_1 and SELECTION_2)
+falsepositives:
+- unknown
+id: 8c521530-5169-495d-a199-0a3a881ad24e
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- http://www.powertheshell.com/ntfsstreams/
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1564.004/T1564.004.md
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1564.004
+- attack.t1096
+- attack.execution
+- attack.t1059.001
+- attack.t1086

rules/sigma/powershell/powershell_script/powershell_powerview_malicious_commandlets.yml

@@ -0,0 +1,149 @@
+
+title: Malicious PowerView PowerShell Commandlets
+author: Bhabesh Raj
+date: 2021/05/18
+description: Detects Commandlet names from PowerView of PowerSploit exploitation framework.
+detection:
+  SELECTION_1:
+    ScriptBlockText:
+    - '*Export-PowerViewCSV*'
+    - '*Get-IPAddress*'
+    - '*Resolve-IPAddress*'
+    - '*Convert-NameToSid*'
+    - '*ConvertTo-SID*'
+    - '*Convert-ADName*'
+    - '*ConvertFrom-UACValue*'
+    - '*Add-RemoteConnection*'
+    - '*Remove-RemoteConnection*'
+    - '*Invoke-UserImpersonation*'
+    - '*Invoke-RevertToSelf*'
+    - '*Request-SPNTicket*'
+    - '*Get-DomainSPNTicket*'
+    - '*Invoke-Kerberoast*'
+    - '*Get-PathAcl*'
+    - '*Get-DNSZone*'
+    - '*Get-DomainDNSZone*'
+    - '*Get-DNSRecord*'
+    - '*Get-DomainDNSRecord*'
+    - '*Get-NetDomain*'
+    - '*Get-Domain*'
+    - '*Get-NetDomainController*'
+    - '*Get-DomainController*'
+    - '*Get-NetForest*'
+    - '*Get-Forest*'
+    - '*Get-NetForestDomain*'
+    - '*Get-ForestDomain*'
+    - '*Get-NetForestCatalog*'
+    - '*Get-ForestGlobalCatalog*'
+    - '*Find-DomainObjectPropertyOutlier*'
+    - '*Get-NetUser*'
+    - '*Get-DomainUser*'
+    - '*New-DomainUser*'
+    - '*Set-DomainUserPassword*'
+    - '*Get-UserEvent*'
+    - '*Get-DomainUserEvent*'
+    - '*Get-NetComputer*'
+    - '*Get-DomainComputer*'
+    - '*Get-ADObject*'
+    - '*Get-DomainObject*'
+    - '*Set-ADObject*'
+    - '*Set-DomainObject*'
+    - '*Get-ObjectAcl*'
+    - '*Get-DomainObjectAcl*'
+    - '*Add-ObjectAcl*'
+    - '*Add-DomainObjectAcl*'
+    - '*Invoke-ACLScanner*'
+    - '*Find-InterestingDomainAcl*'
+    - '*Get-NetOU*'
+    - '*Get-DomainOU*'
+    - '*Get-NetSite*'
+    - '*Get-DomainSite*'
+    - '*Get-NetSubnet*'
+    - '*Get-DomainSubnet*'
+    - '*Get-DomainSID*'
+    - '*Get-NetGroup*'
+    - '*Get-DomainGroup*'
+    - '*New-DomainGroup*'
+    - '*Find-ManagedSecurityGroups*'
+    - '*Get-DomainManagedSecurityGroup*'
+    - '*Get-NetGroupMember*'
+    - '*Get-DomainGroupMember*'
+    - '*Add-DomainGroupMember*'
+    - '*Get-NetFileServer*'
+    - '*Get-DomainFileServer*'
+    - '*Get-DFSshare*'
+    - '*Get-DomainDFSShare*'
+    - '*Get-NetGPO*'
+    - '*Get-DomainGPO*'
+    - '*Get-NetGPOGroup*'
+    - '*Get-DomainGPOLocalGroup*'
+    - '*Find-GPOLocation*'
+    - '*Get-DomainGPOUserLocalGroupMapping*'
+    - '*Find-GPOComputerAdmin*'
+    - '*Get-DomainGPOComputerLocalGroupMapping*'
+    - '*Get-DomainPolicy*'
+    - '*Get-NetLocalGroup*'
+    - '*Get-NetLocalGroupMember*'
+    - '*Get-NetShare*'
+    - '*Get-NetLoggedon*'
+    - '*Get-NetSession*'
+    - '*Get-LoggedOnLocal*'
+    - '*Get-RegLoggedOn*'
+    - '*Get-NetRDPSession*'
+    - '*Invoke-CheckLocalAdminAccess*'
+    - '*Test-AdminAccess*'
+    - '*Get-SiteName*'
+    - '*Get-NetComputerSiteName*'
+    - '*Get-Proxy*'
+    - '*Get-WMIRegProxy*'
+    - '*Get-LastLoggedOn*'
+    - '*Get-WMIRegLastLoggedOn*'
+    - '*Get-CachedRDPConnection*'
+    - '*Get-WMIRegCachedRDPConnection*'
+    - '*Get-RegistryMountedDrive*'
+    - '*Get-WMIRegMountedDrive*'
+    - '*Get-NetProcess*'
+    - '*Get-WMIProcess*'
+    - '*Find-InterestingFile*'
+    - '*Invoke-UserHunter*'
+    - '*Find-DomainUserLocation*'
+    - '*Invoke-ProcessHunter*'
+    - '*Find-DomainProcess*'
+    - '*Invoke-EventHunter*'
+    - '*Find-DomainUserEvent*'
+    - '*Invoke-ShareFinder*'
+    - '*Find-DomainShare*'
+    - '*Invoke-FileFinder*'
+    - '*Find-InterestingDomainShareFile*'
+    - '*Find-LocalAdminAccess*'
+    - '*Invoke-EnumerateLocalAdmin*'
+    - '*Find-DomainLocalGroupMember*'
+    - '*Get-NetDomainTrust*'
+    - '*Get-DomainTrust*'
+    - '*Get-NetForestTrust*'
+    - '*Get-ForestTrust*'
+    - '*Find-ForeignUser*'
+    - '*Get-DomainForeignUser*'
+    - '*Find-ForeignGroup*'
+    - '*Get-DomainForeignGroupMember*'
+    - '*Invoke-MapDomainTrust*'
+    - '*Get-DomainTrustMapping*'
+  condition: SELECTION_1
+falsepositives:
+- Should not be any as administrators do not use this tool
+id: dcd74b95-3f36-4ed9-9598-0490951643aa
+level: high
+logsource:
+  category: ps_script
+  definition: Script Block Logging must be enable
+  product: windows
+modified: 2021/10/16
+references:
+- https://powersploit.readthedocs.io/en/stable/Recon/README
+- https://github.com/PowerShellMafia/PowerSploit/tree/master/Recon
+- https://thedfirreport.com/2020/10/08/ryuks-return
+- https://adsecurity.org/?p=2277
+status: experimental
+tags:
+- attack.execution
+- attack.t1059.001

rules/sigma/powershell/powershell_script/powershell_prompt_credentials.yml

@@ -0,0 +1,27 @@
+
+title: PowerShell Credential Prompt
+author: John Lambert (idea), Florian Roth (rule)
+date: 2017/04/09
+description: Detects PowerShell calling a credential prompt
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*PromptForCredential*'
+  condition: SELECTION_1
+falsepositives:
+- Unknown
+id: ca8b77a9-d499-4095-b793-5d5f330d450e
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://twitter.com/JohnLaTwC/status/850381440629981184
+- https://t.co/ezOTGy1a1G
+status: experimental
+tags:
+- attack.credential_access
+- attack.execution
+- attack.t1059.001
+- attack.t1086

rules/sigma/powershell/powershell_script/powershell_psattack.yml

@@ -0,0 +1,25 @@
+
+title: PowerShell PSAttack
+author: Sean Metcalf (source), Florian Roth (rule)
+date: 2017/03/05
+description: Detects the use of PSAttack PowerShell hack tool
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*PS ATTACK!!!*'
+  condition: SELECTION_1
+falsepositives:
+- Pentesters
+id: b7ec41a4-042c-4f31-a5db-d0fcde9fa5c5
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://adsecurity.org/?p=2921
+status: experimental
+tags:
+- attack.execution
+- attack.t1059.001
+- attack.t1086

rules/sigma/powershell/powershell_script/powershell_set_policies_to_unsecure_level.yml

@@ -0,0 +1,29 @@
+
+title: Change PowerShell Policies to a Unsecure Level
+author: frack113
+date: 2021/10/20
+description: Detects use of Set-ExecutionPolicy to set a unsecure policies
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*Set-ExecutionPolicy*'
+  SELECTION_2:
+    ScriptBlockText:
+    - '*Unrestricted*'
+    - '*bypass*'
+    - '*RemoteSigned*'
+  condition: (SELECTION_1 and SELECTION_2)
+falsepositives:
+- Administrator script
+id: 61d0475c-173f-4844-86f7-f3eebae1c66b
+level: high
+logsource:
+  category: ps_script
+  product: windows
+references:
+- https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.security/set-executionpolicy?view=powershell-7.1
+- https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_execution_policies?view=powershell-7.1
+- https://adsecurity.org/?p=2604
+status: experimental
+tags:
+- attack.execution
+- attack.t1059.001

rules/sigma/powershell/powershell_script/powershell_shellcode_b64.yml

@@ -0,0 +1,32 @@
+
+title: PowerShell ShellCode
+author: David Ledbetter (shellcode), Florian Roth (rule)
+date: 2018/11/17
+description: Detects Base64 encoded Shellcode
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*AAAAYInlM*'
+  SELECTION_2:
+    ScriptBlockText:
+    - '*OiCAAAAYInlM*'
+    - '*OiJAAAAYInlM*'
+  condition: (SELECTION_1 and SELECTION_2)
+falsepositives:
+- Unknown
+id: 16b37b70-6fcf-4814-a092-c36bd3aafcbd
+level: critical
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://twitter.com/cyb3rops/status/1063072865992523776
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.privilege_escalation
+- attack.t1055
+- attack.execution
+- attack.t1059.001
+- attack.t1086

rules/sigma/powershell/powershell_script/powershell_shellintel_malicious_commandlets.yml

@@ -0,0 +1,28 @@
+
+title: Malicious ShellIntel PowerShell Commandlets
+author: Max Altgelt, Tobias Michalski
+date: 2021/08/09
+description: Detects Commandlet names from ShellIntel exploitation scripts.
+detection:
+  SELECTION_1:
+    ScriptBlockText:
+    - '*Invoke-SMBAutoBrute*'
+    - '*Invoke-GPOLinks*'
+    - '*Out-Minidump*'
+    - '*Invoke-Potato*'
+  condition: SELECTION_1
+falsepositives:
+- Unknown
+id: 402e1e1d-ad59-47b6-bf80-1ee44985b3a7
+level: high
+logsource:
+  category: ps_script
+  definition: Script Block Logging must be enable
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/Shellntel/scripts/
+status: experimental
+tags:
+- attack.execution
+- attack.t1059.001

rules/sigma/powershell/powershell_script/powershell_software_discovery.yml

@@ -0,0 +1,33 @@
+
+title: Detected Windows Software Discovery
+author: Nikita Nazarov, oscd.community
+date: 2020/10/16
+description: Adversaries may attempt to enumerate software for a variety of reasons,
+  such as figuring out what security measures are present or if the compromised system
+  has a version of software that is vulnerable.
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*get-itemProperty*'
+  SELECTION_2:
+    ScriptBlockText: '*\software\\*'
+  SELECTION_3:
+    ScriptBlockText: '*select-object*'
+  SELECTION_4:
+    ScriptBlockText: '*format-table*'
+  condition: (SELECTION_1 and SELECTION_2 and SELECTION_3 and SELECTION_4)
+falsepositives:
+- Legitimate administration activities
+id: 2650dd1a-eb2a-412d-ac36-83f06c4f2282
+level: medium
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/11/12
+references:
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1518/T1518.md
+- https://github.com/harleyQu1nn/AggressorScripts
+status: experimental
+tags:
+- attack.discovery
+- attack.t1518

rules/sigma/powershell/powershell_script/powershell_store_file_in_alternate_data_stream.yml

@@ -0,0 +1,30 @@
+
+title: Powershell Store File In Alternate Data Stream
+author: frack113
+date: 2021/09/02
+description: Storing files in Alternate Data Stream (ADS) similar to Astaroth malware.
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*Start-Process*'
+  SELECTION_2:
+    ScriptBlockText: '*-FilePath "$env:comspec" *'
+  SELECTION_3:
+    ScriptBlockText: '*-ArgumentList *'
+  SELECTION_4:
+    ScriptBlockText: '*>*'
+  condition: (SELECTION_1 and SELECTION_2 and SELECTION_3 and SELECTION_4)
+falsepositives:
+- Unknown
+id: a699b30e-d010-46c8-bbd1-ee2e26765fe9
+level: medium
+logsource:
+  category: ps_script
+  definition: EnableScriptBlockLogging must be set to enable
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1564.004/T1564.004.md
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1564.004

rules/sigma/powershell/powershell_script/powershell_susp_zip_compress_in_scriptblocktext.yml

@@ -0,0 +1,31 @@
+
+title: Zip A Folder With PowerShell For Staging In Temp
+author: frack113
+date: 2021/07/20
+description: Use living off the land tools to zip a file and stage it in the Windows
+  temporary folder for later exfiltration
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*Compress-Archive *'
+  SELECTION_2:
+    ScriptBlockText: '* -Path *'
+  SELECTION_3:
+    ScriptBlockText: '* -DestinationPath *'
+  SELECTION_4:
+    ScriptBlockText: '*$env:TEMP\\*'
+  condition: (SELECTION_1 and SELECTION_2 and SELECTION_3 and SELECTION_4)
+falsepositives:
+- Unknown
+id: b7a3c9a3-09ea-4934-8864-6a32cacd98d9
+level: medium
+logsource:
+  category: ps_script
+  definition: Script Block Logging must be enable
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1074.001/T1074.001.md
+status: experimental
+tags:
+- attack.collection
+- attack.t1074.001

rules/sigma/powershell/powershell_script/powershell_suspicious_download_in_scriptblocktext.yml

@@ -0,0 +1,29 @@
+
+title: Suspicious PowerShell Download
+author: Florian Roth
+date: 2017/03/05
+description: Detects suspicious PowerShell download command
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*System.Net.WebClient*'
+  SELECTION_2:
+    ScriptBlockText:
+    - '*.DownloadFile(*'
+    - '*.DownloadString(*'
+  condition: (SELECTION_1 and SELECTION_2)
+falsepositives:
+- PowerShell scripts that download content from the Internet
+id: 403c2cc0-7f6b-4925-9423-bfa573bed7eb
+level: medium
+logsource:
+  category: ps_script
+  product: windows
+modified: 2021/10/18
+related:
+- id: 65531a81-a694-4e31-ae04-f8ba5bc33759
+  type: derived
+status: experimental
+tags:
+- attack.execution
+- attack.t1059.001
+- attack.t1086

rules/sigma/powershell/powershell_script/powershell_suspicious_export_pfxcertificate.yml

@@ -0,0 +1,28 @@
+
+title: Suspicious Export-PfxCertificate
+author: Florian Roth
+date: 2021/04/23
+description: Detects Commandlet that is used to export certificates from the local
+  certificate store and sometimes used by threat actors to steal private keys from
+  compromised machines
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*Export-PfxCertificate*'
+  condition: SELECTION_1
+falsepositives:
+- Legitimate certificate exports invoked by administrators or users (depends on processes
+  in the environment - filter if unusable)
+id: aa7a3fce-bef5-4311-9cc1-5f04bb8c308c
+level: high
+logsource:
+  category: ps_script
+  definition: Script Block Logging must be enable
+  product: windows
+modified: 2021/08/04
+references:
+- https://us-cert.cisa.gov/ncas/analysis-reports/ar21-112a
+- https://docs.microsoft.com/en-us/powershell/module/pki/export-pfxcertificate
+status: experimental
+tags:
+- attack.credential_access
+- attack.t1552.004

rules/sigma/powershell/powershell_script/powershell_suspicious_getprocess_lsass.yml

@@ -0,0 +1,26 @@
+
+title: PowerShell Get-Process LSASS in ScriptBlock
+author: Florian Roth
+date: 2021/04/23
+description: Detects a Get-Process command on lsass process, which is in almost all
+  cases a sign of malicious activity
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*Get-Process lsass*'
+  condition: SELECTION_1
+falsepositives:
+- Legitimate certificate exports invoked by administrators or users (depends on processes
+  in the environment - filter if unusable)
+id: 84c174ab-d3ef-481f-9c86-a50d0b8e3edb
+level: high
+logsource:
+  category: ps_script
+  definition: Script Block Logging must be enable
+  product: windows
+modified: 2021/10/16
+references:
+- https://twitter.com/PythonResponder/status/1385064506049630211
+status: experimental
+tags:
+- attack.credential_access
+- attack.t1003.001

rules/sigma/powershell/powershell_script/powershell_suspicious_invocation_generic_in_scriptblocktext.yml

@@ -0,0 +1,37 @@
+
+title: Suspicious PowerShell Invocations - Generic
+author: Florian Roth (rule)
+date: 2017/03/12
+description: Detects suspicious PowerShell invocation command parameters
+detection:
+  SELECTION_1:
+    ScriptBlockText:
+    - '* -enc *'
+    - '* -EncodedCommand *'
+  SELECTION_2:
+    ScriptBlockText:
+    - '* -w hidden *'
+    - '* -window hidden *'
+    - '* -windowstyle hidden *'
+  SELECTION_3:
+    ScriptBlockText:
+    - '* -noni *'
+    - '* -noninteractive *'
+  condition: (SELECTION_1 and SELECTION_2 and SELECTION_3)
+falsepositives:
+- Penetration tests
+- Very special / sneaky PowerShell scripts
+id: ed965133-513f-41d9-a441-e38076a0798f
+level: high
+logsource:
+  category: ps_script
+  product: windows
+modified: 2021/10/18
+related:
+- id: 3d304fda-78aa-43ed-975c-d740798a49c1
+  type: derived
+status: experimental
+tags:
+- attack.execution
+- attack.t1059.001
+- attack.t1086

rules/sigma/powershell/powershell_script/powershell_suspicious_invocation_specific_in_scripblocktext.yml

@@ -0,0 +1,94 @@
+
+title: Suspicious PowerShell Invocations - Specific
+author: Florian Roth (rule), Jonhnathan Ribeiro
+date: 2017/03/05
+description: Detects suspicious PowerShell invocation command parameters
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*-nop*'
+  SELECTION_10:
+    ScriptBlockText: '* -c *'
+  SELECTION_11:
+    ScriptBlockText: '*iex*'
+  SELECTION_12:
+    ScriptBlockText: '*New-Object*'
+  SELECTION_13:
+    ScriptBlockText: '* -w *'
+  SELECTION_14:
+    ScriptBlockText: '*hidden*'
+  SELECTION_15:
+    ScriptBlockText: '*-ep*'
+  SELECTION_16:
+    ScriptBlockText: '*bypass*'
+  SELECTION_17:
+    ScriptBlockText: '*-Enc*'
+  SELECTION_18:
+    ScriptBlockText: '*powershell*'
+  SELECTION_19:
+    ScriptBlockText: '*reg*'
+  SELECTION_2:
+    ScriptBlockText: '* -w *'
+  SELECTION_20:
+    ScriptBlockText: '*add*'
+  SELECTION_21:
+    ScriptBlockText: '*HKCU\software\microsoft\windows\currentversion\run*'
+  SELECTION_22:
+    ScriptBlockText: '*bypass*'
+  SELECTION_23:
+    ScriptBlockText: '*-noprofile*'
+  SELECTION_24:
+    ScriptBlockText: '*-windowstyle*'
+  SELECTION_25:
+    ScriptBlockText: '*hidden*'
+  SELECTION_26:
+    ScriptBlockText: '*new-object*'
+  SELECTION_27:
+    ScriptBlockText: '*system.net.webclient*'
+  SELECTION_28:
+    ScriptBlockText: '*.download*'
+  SELECTION_29:
+    ScriptBlockText: '*iex*'
+  SELECTION_3:
+    ScriptBlockText: '*hidden*'
+  SELECTION_30:
+    ScriptBlockText: '*New-Object*'
+  SELECTION_31:
+    ScriptBlockText: '*Net.WebClient*'
+  SELECTION_32:
+    ScriptBlockText: '*.Download*'
+  SELECTION_4:
+    ScriptBlockText: '* -c *'
+  SELECTION_5:
+    ScriptBlockText: '*[Convert]::FromBase64String*'
+  SELECTION_6:
+    ScriptBlockText: '* -w *'
+  SELECTION_7:
+    ScriptBlockText: '*hidden*'
+  SELECTION_8:
+    ScriptBlockText: '*-noni*'
+  SELECTION_9:
+    ScriptBlockText: '*-nop*'
+  condition: ((SELECTION_1 and SELECTION_2 and SELECTION_3 and SELECTION_4 and SELECTION_5)
+    or (SELECTION_6 and SELECTION_7 and SELECTION_8 and SELECTION_9 and SELECTION_10
+    and SELECTION_11 and SELECTION_12) or (SELECTION_13 and SELECTION_14 and SELECTION_15
+    and SELECTION_16 and SELECTION_17) or (SELECTION_18 and SELECTION_19 and SELECTION_20
+    and SELECTION_21) or (SELECTION_22 and SELECTION_23 and SELECTION_24 and SELECTION_25
+    and SELECTION_26 and SELECTION_27 and SELECTION_28) or (SELECTION_29 and SELECTION_30
+    and SELECTION_31 and SELECTION_32))
+falsepositives:
+- Penetration tests
+id: ae7fbf8e-f3cb-49fd-8db4-5f3bed522c71
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/18
+related:
+- id: fce5f582-cc00-41e1-941a-c6fabf0fdb8c
+  type: derived
+status: experimental
+tags:
+- attack.execution
+- attack.t1059.001
+- attack.t1086

rules/sigma/powershell/powershell_script/powershell_suspicious_keywords.yml

@@ -0,0 +1,39 @@
+
+title: Suspicious PowerShell Keywords
+author: Florian Roth, Perez Diego (@darkquassar)
+date: 2019/02/11
+description: Detects keywords that could indicate the use of some PowerShell exploitation
+  framework
+detection:
+  SELECTION_1:
+    ScriptBlockText:
+    - '*System.Reflection.Assembly.Load($*'
+    - '*[System.Reflection.Assembly]::Load($*'
+    - '*[Reflection.Assembly]::Load($*'
+    - '*System.Reflection.AssemblyName*'
+    - '*Reflection.Emit.AssemblyBuilderAccess*'
+    - '*Runtime.InteropServices.DllImportAttribute*'
+    - '*SuspendThread*'
+    - '*rundll32*'
+    - '*Invoke-WMIMethod*'
+    - '*http://127.0.0.1*'
+  condition: SELECTION_1
+falsepositives:
+- Penetration tests
+id: 1f49f2ab-26bc-48b3-96cc-dcffbc93eadf
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled for 4104
+  product: windows
+modified: 2021/10/16
+references:
+- https://posts.specterops.io/entering-a-covenant-net-command-and-control-e11038bcf462
+- https://github.com/PowerShellMafia/PowerSploit/blob/master/CodeExecution/Invoke-ReflectivePEInjection.ps1
+- https://github.com/hlldz/Invoke-Phant0m/blob/master/Invoke-Phant0m.ps1
+- https://gist.github.com/MHaggis/0dbe00ad401daa7137c81c99c268cfb7
+status: experimental
+tags:
+- attack.execution
+- attack.t1059.001
+- attack.t1086

rules/sigma/powershell/powershell_script/powershell_suspicious_mail_acces.yml

@@ -0,0 +1,30 @@
+
+title: Powershell Local Email Collection
+author: frack113
+date: 2021/07/21
+description: Adversaries may target user email on local systems to collect sensitive
+  information. Files containing email data can be acquired from a user’s local system,
+  such as Outlook storage or cache files.
+detection:
+  SELECTION_1:
+    ScriptBlockText:
+    - '*Get-Inbox.ps1*'
+    - '*Microsoft.Office.Interop.Outlook*'
+    - '*Microsoft.Office.Interop.Outlook.olDefaultFolders*'
+    - '*-comobject outlook.application*'
+  condition: SELECTION_1
+falsepositives:
+- Unknown
+id: 2837e152-93c8-43d2-85ba-c3cd3c2ae614
+level: medium
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1114.001/T1114.001.md
+status: experimental
+tags:
+- attack.collection
+- attack.t1114.001

rules/sigma/powershell/powershell_script/powershell_suspicious_mounted_share_deletion.yml

@@ -0,0 +1,28 @@
+
+title: PowerShell Deleted Mounted Share
+author: oscd.community, @redcanary, Zach Stanford @svch0st
+date: 2020/10/08
+description: Detects when when a mounted share is removed. Adversaries may remove
+  share connections that are no longer useful in order to clean up traces of their
+  operation
+detection:
+  SELECTION_1:
+    ScriptBlockText:
+    - '*Remove-SmbShare*'
+    - '*Remove-FileShare*'
+  condition: SELECTION_1
+falsepositives:
+- Administrators or Power users may remove their shares via cmd line
+id: 66a4d409-451b-4151-94f4-a55d559c49b0
+level: medium
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1070.005/T1070.005.md
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1070.005

rules/sigma/powershell/powershell_script/powershell_suspicious_recon.yml

@@ -0,0 +1,30 @@
+
+title: Recon Information for Export with PowerShell
+author: frack113
+date: 2021/07/30
+description: Once established within a system or network, an adversary may use automated
+  techniques for collecting internal data
+detection:
+  SELECTION_1:
+    ScriptBlockText:
+    - '*Get-Service *'
+    - '*Get-ChildItem *'
+    - '*Get-Process *'
+  SELECTION_2:
+    ScriptBlockText: '*> $env:TEMP\\*'
+  condition: (SELECTION_1 and SELECTION_2)
+falsepositives:
+- Unknown
+id: a9723fcc-881c-424c-8709-fd61442ab3c3
+level: medium
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1119/T1119.md
+status: experimental
+tags:
+- attack.collection
+- attack.t1119

rules/sigma/powershell/powershell_script/powershell_suspicious_win32_pnpentity.yml

@@ -0,0 +1,25 @@
+
+title: Powershell Suspicious Win32_PnPEntity
+author: frack113
+date: 2021/08/23
+description: Adversaries may attempt to gather information about attached peripheral
+  devices and components connected to a computer system.
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*Win32_PnPEntity*'
+  condition: SELECTION_1
+falsepositives:
+- admin script
+id: b26647de-4feb-4283-af6b-6117661283c5
+level: low
+logsource:
+  category: ps_script
+  definition: EnableScriptBlockLogging must be set to enable
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1120/T1120.md
+status: experimental
+tags:
+- attack.discovery
+- attack.t1120

rules/sigma/powershell/powershell_script/powershell_suspicious_windowstyle.yml

@@ -0,0 +1,28 @@
+
+title: Suspicious PowerShell WindowStyle Option
+author: frack113
+date: 2021/10/20
+description: Adversaries may use hidden windows to conceal malicious activity from
+  the plain sight of users. In some cases, windows that would typically be displayed
+  when an application carries out an operation can be hidden
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*powershell*'
+  SELECTION_2:
+    ScriptBlockText: '*WindowStyle*'
+  SELECTION_3:
+    ScriptBlockText: '*Hidden*'
+  condition: (SELECTION_1 and SELECTION_2 and SELECTION_3)
+falsepositives:
+- Unknown
+id: 313fbb0a-a341-4682-848d-6d6f8c4fab7c
+level: medium
+logsource:
+  category: ps_script
+  product: windows
+references:
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1564.003/T1564.003.md
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1564.003

rules/sigma/powershell/powershell_script/powershell_syncappvpublishingserver_exe_in_scriptblocktext.yml

@@ -0,0 +1,29 @@
+
+title: SyncAppvPublishingServer Execution to Bypass Powershell Restriction
+author: Ensar Şamil, @sblmsrsn, OSCD Community
+date: 2020/10/05
+description: Detects SyncAppvPublishingServer process execution which usually utilized
+  by adversaries to bypass PowerShell execution restrictions.
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*SyncAppvPublishingServer.exe*'
+  condition: SELECTION_1
+falsepositives:
+- App-V clients
+id: dddfebae-c46f-439c-af7a-fdb6bde90218
+level: medium
+logsource:
+  category: ps_script
+  product: windows
+modified: 2021/10/18
+references:
+- https://lolbas-project.github.io/lolbas/Binaries/Syncappvpublishingserver/
+related:
+- id: fde7929d-8beb-4a4c-b922-be9974671667
+  type: derived
+- id: 9f7aa113-9da6-4a8d-907c-5f1a4b908299
+  type: derived
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1218

rules/sigma/powershell/powershell_script/powershell_timestomp.yml

@@ -0,0 +1,34 @@
+
+title: Powershell Timestomp
+author: frack113
+date: 2021/08/03
+description: Adversaries may modify file time attributes to hide new or changes to
+  existing files. Timestomping is a technique that modifies the timestamps of a file
+  (the modify, access, create, and change times), often to mimic files that are in
+  the same folder.
+detection:
+  SELECTION_1:
+    ScriptBlockText:
+    - '*.CreationTime =*'
+    - '*.LastWriteTime =*'
+    - '*.LastAccessTime =*'
+    - '*[IO.File]::SetCreationTime*'
+    - '*[IO.File]::SetLastAccessTime*'
+    - '*[IO.File]::SetLastWriteTime*'
+  condition: SELECTION_1
+falsepositives:
+- legitime admin script
+id: c6438007-e081-42ce-9483-b067fbef33c3
+level: medium
+logsource:
+  category: ps_script
+  definition: EnableScriptBlockLogging must be set to enable
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1070.006/T1070.006.md
+- https://www.offensive-security.com/metasploit-unleashed/timestomp/
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1070.006

rules/sigma/powershell/powershell_script/powershell_trigger_profiles.yml

@@ -0,0 +1,33 @@
+
+title: Powershell Trigger Profiles by Add_Content
+author: frack113
+date: 2021/08/18
+description: Adversaries may gain persistence and elevate privileges by executing
+  malicious content triggered by PowerShell profiles.
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*Add-Content*'
+  SELECTION_2:
+    ScriptBlockText: '*$profile*'
+  SELECTION_3:
+    ScriptBlockText: '*-Value*'
+  SELECTION_4:
+    ScriptBlockText:
+    - '*Start-Process*'
+    - '*""*'
+  condition: (SELECTION_1 and SELECTION_2 and SELECTION_3 and SELECTION_4)
+falsepositives:
+- Unknown
+id: 05b3e303-faf0-4f4a-9b30-46cc13e69152
+level: medium
+logsource:
+  category: ps_script
+  definition: EnableScriptBlockLogging must be set to enable
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1546.013/T1546.013.md
+status: experimental
+tags:
+- attack.privilege_escalation
+- attack.t1546.013

rules/sigma/powershell/powershell_script/powershell_web_request.yml

@@ -0,0 +1,36 @@
+
+title: Windows PowerShell Web Request
+author: James Pemberton / @4A616D6573
+date: 2019/10/24
+description: Detects the use of various web request methods (including aliases) via
+  Windows PowerShell command
+detection:
+  SELECTION_1:
+    ScriptBlockText:
+    - '*Invoke-WebRequest*'
+    - '*iwr *'
+    - '*wget *'
+    - '*curl *'
+    - '*Net.WebClient*'
+    - '*Start-BitsTransfer*'
+  condition: SELECTION_1
+falsepositives:
+- Use of Get-Command and Get-Help modules to reference Invoke-WebRequest and Start-BitsTransfer.
+id: 1139d2e2-84b1-4226-b445-354492eba8ba
+level: medium
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://4sysops.com/archives/use-powershell-to-download-a-file-with-http-https-and-ftp/
+- https://blog.jourdant.me/post/3-ways-to-download-files-with-powershell
+related:
+- id: 9fc51a3c-81b3-4fa7-b35f-7c02cf10fd2d
+  type: derived
+status: experimental
+tags:
+- attack.execution
+- attack.t1059.001
+- attack.t1086

rules/sigma/powershell/powershell_script/powershell_windows_firewall_profile_disabled.yml

@@ -0,0 +1,33 @@
+
+title: Windows Firewall Profile Disabled
+author: Austin Songer @austinsonger
+date: 2021/10/12
+description: Detects when a user disables the Windows Firewall via a Profile to help
+  evade defense.
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*Set-NetFirewallProfile*'
+  SELECTION_2:
+    ScriptBlockText: '*-Profile*'
+  SELECTION_3:
+    ScriptBlockText: '*-Enabled*'
+  SELECTION_4:
+    ScriptBlockText: '*False*'
+  condition: (SELECTION_1 and SELECTION_2 and SELECTION_3 and SELECTION_4)
+falsepositives:
+- Unknown
+id: 488b44e7-3781-4a71-888d-c95abfacf44d
+level: high
+logsource:
+  category: ps_script
+  product: windows
+modified: 2021/10/16
+references:
+- https://docs.microsoft.com/en-us/powershell/module/netsecurity/set-netfirewallprofile?view=windowsserver2019-ps
+- https://www.tutorialspoint.com/how-to-get-windows-firewall-profile-settings-using-powershell
+- http://powershellhelp.space/commands/set-netfirewallrule-psv5.php
+- http://woshub.com/manage-windows-firewall-powershell/
+status: experimental
+tags:
+- attack.defense_evasion
+- attack.t1562.004

rules/sigma/powershell/powershell_script/powershell_winlogon_helper_dll.yml

@@ -0,0 +1,35 @@
+
+title: Winlogon Helper DLL
+author: Timur Zinniatullin, oscd.community
+date: 2019/10/21
+description: Winlogon.exe is a Windows component responsible for actions at logon/logoff
+  as well as the secure attention sequence (SAS) triggered by Ctrl-Alt-Delete. Registry
+  entries in HKLM\Software[Wow6432Node]Microsoft\Windows NT\CurrentVersion\Winlogon\
+  and HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\ are used to manage
+  additional helper programs and functionalities that support Winlogon. Malicious
+  modifications to these Registry keys may cause Winlogon to load and execute malicious
+  DLLs and/or executables.
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*CurrentVersion\Winlogon*'
+  SELECTION_2:
+    ScriptBlockText:
+    - '*Set-ItemProperty*'
+    - '*New-Item*'
+  condition: (SELECTION_1 and SELECTION_2)
+falsepositives:
+- Unknown
+id: 851c506b-6b7c-4ce2-8802-c703009d03c0
+level: medium
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1547.004/T1547.004.md
+status: experimental
+tags:
+- attack.persistence
+- attack.t1547.004
+- attack.t1004

rules/sigma/powershell/powershell_script/powershell_wmi_persistence.yml

@@ -0,0 +1,35 @@
+
+title: Powershell WMI Persistence
+author: frack113
+date: 2021/08/19
+description: Adversaries may establish persistence and elevate privileges by executing
+  malicious content triggered by a Windows Management Instrumentation (WMI) event
+  subscription.
+detection:
+  SELECTION_1:
+    ScriptBlockText: '*New-CimInstance *'
+  SELECTION_2:
+    ScriptBlockText: '*-Namespace root/subscription *'
+  SELECTION_3:
+    ScriptBlockText: '*-Property *'
+  SELECTION_4:
+    ScriptBlockText: '*-ClassName __EventFilter *'
+  SELECTION_5:
+    ScriptBlockText: '*-ClassName CommandLineEventConsumer *'
+  condition: (SELECTION_1 and SELECTION_2 and SELECTION_3 and (SELECTION_4 or SELECTION_5))
+falsepositives:
+- Unknown
+id: 9e07f6e7-83aa-45c6-998e-0af26efd0a85
+level: medium
+logsource:
+  category: ps_script
+  definition: EnableScriptBlockLogging must be set to enable
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1546.003/T1546.003.md
+- https://github.com/EmpireProject/Empire/blob/master/data/module_source/persistence/Persistence.psm1#L545
+status: experimental
+tags:
+- attack.privilege_escalation
+- attack.t1546.003

rules/sigma/powershell/powershell_script/powershell_wmimplant.yml

@@ -0,0 +1,44 @@
+
+title: WMImplant Hack Tool
+author: NVISO
+date: 2020/03/26
+description: Detects parameters used by WMImplant
+detection:
+  SELECTION_1:
+    ScriptBlockText:
+    - '*WMImplant*'
+    - '* change_user *'
+    - '* gen_cli *'
+    - '* command_exec *'
+    - '* disable_wdigest *'
+    - '* disable_winrm *'
+    - '* enable_wdigest *'
+    - '* enable_winrm *'
+    - '* registry_mod *'
+    - '* remote_posh *'
+    - '* sched_job *'
+    - '* service_mod *'
+    - '* process_kill *'
+    - '* active_users *'
+    - '* basic_info *'
+    - '* power_off *'
+    - '* vacant_system *'
+    - '* logon_events *'
+  condition: SELECTION_1
+falsepositives:
+- Administrative scripts that use the same keywords.
+id: 8028c2c3-e25a-46e3-827f-bbb5abf181d7
+level: high
+logsource:
+  category: ps_script
+  definition: Script block logging must be enabled
+  product: windows
+modified: 2021/10/16
+references:
+- https://github.com/FortyNorthSecurity/WMImplant
+status: experimental
+tags:
+- attack.execution
+- attack.t1047
+- attack.t1059.001
+- attack.t1086