103 lines
3.3 KiB
YAML
103 lines
3.3 KiB
YAML
title: File Created with System Process Name
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author: Sander Wiebing
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date: 2020/05/26
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description: Detects the creation of an executable with a system process name in a
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suspicious folder
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detection:
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SELECTION_1:
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EventID: 11
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SELECTION_10:
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TargetFilename: '*\csrss.exe'
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SELECTION_11:
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TargetFilename: '*\conhost.exe'
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SELECTION_12:
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TargetFilename: '*\wininit.exe'
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SELECTION_13:
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TargetFilename: '*\lsm.exe'
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SELECTION_14:
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TargetFilename: '*\winlogon.exe'
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SELECTION_15:
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TargetFilename: '*\explorer.exe'
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SELECTION_16:
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TargetFilename: '*\taskhost.exe'
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SELECTION_17:
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TargetFilename: '*\Taskmgr.exe'
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SELECTION_18:
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TargetFilename: '*\taskmgr.exe'
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SELECTION_19:
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TargetFilename: '*\sihost.exe'
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SELECTION_2:
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TargetFilename: '*\svchost.exe'
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SELECTION_20:
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TargetFilename: '*\RuntimeBroker.exe'
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SELECTION_21:
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TargetFilename: '*\runtimebroker.exe'
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SELECTION_22:
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TargetFilename: '*\smartscreen.exe'
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SELECTION_23:
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TargetFilename: '*\dllhost.exe'
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SELECTION_24:
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TargetFilename: '*\audiodg.exe'
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SELECTION_25:
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TargetFilename: '*\wlanext.exe'
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SELECTION_26:
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TargetFilename: C:\Windows\System32\\*
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SELECTION_27:
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TargetFilename: C:\Windows\system32\\*
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SELECTION_28:
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TargetFilename: C:\Windows\SysWow64\\*
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SELECTION_29:
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TargetFilename: C:\Windows\SysWOW64\\*
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SELECTION_3:
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TargetFilename: '*\rundll32.exe'
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SELECTION_30:
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TargetFilename: C:\Windows\winsxs\\*
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SELECTION_31:
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TargetFilename: C:\Windows\WinSxS\\*
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SELECTION_32:
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TargetFilename: \SystemRoot\System32\\*
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SELECTION_33:
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Image: '*\Windows\System32\dism.exe'
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SELECTION_34:
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TargetFilename: C:\$WINDOWS.~BT\\*
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SELECTION_35:
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Image: C:\$WINDOWS.~BT\Sources\SetupHost.exe
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SELECTION_4:
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TargetFilename: '*\services.exe'
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SELECTION_5:
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TargetFilename: '*\powershell.exe'
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SELECTION_6:
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TargetFilename: '*\regsvr32.exe'
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SELECTION_7:
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TargetFilename: '*\spoolsv.exe'
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SELECTION_8:
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TargetFilename: '*\lsass.exe'
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SELECTION_9:
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TargetFilename: '*\smss.exe'
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condition: (SELECTION_1 and ((SELECTION_2 or SELECTION_3 or SELECTION_4 or SELECTION_5
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or SELECTION_6 or SELECTION_7 or SELECTION_8 or SELECTION_9 or SELECTION_10
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or SELECTION_11 or SELECTION_12 or SELECTION_13 or SELECTION_14 or SELECTION_15
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or SELECTION_16 or SELECTION_17 or SELECTION_18 or SELECTION_19 or SELECTION_20
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or SELECTION_21 or SELECTION_22 or SELECTION_23 or SELECTION_24 or SELECTION_25)
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and not ((SELECTION_26 or SELECTION_27 or SELECTION_28 or SELECTION_29 or
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SELECTION_30 or SELECTION_31 or SELECTION_32) and SELECTION_33)) and not
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(SELECTION_34 and SELECTION_35))
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falsepositives:
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- System processes copied outside the default folder
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fields:
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- Image
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id: d5866ddf-ce8f-4aea-b28e-d96485a20d3d
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level: high
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logsource:
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category: file_event
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product: windows
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modified: 2021/10/28
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status: test
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tags:
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- attack.defense_evasion
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- attack.t1036
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- attack.t1036.005
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yml_filename: sysmon_creation_system_file.yml
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yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/file_event
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