67 lines
2.2 KiB
YAML
67 lines
2.2 KiB
YAML
title: In-memory PowerShell
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author: Tom Kern, oscd.community, Natalia Shornikova, Tim Shelton
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date: 2019/11/14
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description: Detects loading of essential DLL used by PowerShell, but not by the process
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powershell.exe. Detects meterpreter's "load powershell" extension.
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detection:
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SELECTION_1:
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EventID: 7
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SELECTION_10:
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Image: '*\wsmprovhost.exe'
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SELECTION_11:
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Image: '*\winrshost.exe'
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SELECTION_12:
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Image: '*\syncappvpublishingserver.exe'
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SELECTION_13:
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Image: '*\runscripthelper.exe'
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SELECTION_14:
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Image: '*\ServerManager.exe'
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SELECTION_15:
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Image: '*\Microsoft SQL Server Management Studio *\Common*\IDE\Ssms.exe'
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SELECTION_2:
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ImageLoaded: '*\System.Management.Automation.Dll'
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SELECTION_3:
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ImageLoaded: '*\System.Management.Automation.ni.Dll'
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SELECTION_4:
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Image: '*\powershell.exe'
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SELECTION_5:
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Image: '*\powershell_ise.exe'
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SELECTION_6:
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Image: '*\WINDOWS\System32\sdiagnhost.exe'
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SELECTION_7:
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Image: '*\mscorsvw.exe'
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SELECTION_8:
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Image: '*\WINDOWS\System32\RemoteFXvGPUDisablement.exe'
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SELECTION_9:
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Image: '*\sqlps.exe'
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condition: (SELECTION_1 and (SELECTION_2 or SELECTION_3) and not ((SELECTION_4
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or SELECTION_5 or SELECTION_6 or SELECTION_7 or SELECTION_8 or SELECTION_9
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or SELECTION_10 or SELECTION_11 or SELECTION_12 or SELECTION_13 or SELECTION_14
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or SELECTION_15)))
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enrichment:
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- EN_0001_cache_sysmon_event_id_1_info
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- EN_0003_enrich_other_sysmon_events_with_event_id_1_data
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falsepositives:
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- Used by some .NET binaries, minimal on user workstation.
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- Used by Microsoft SQL Server Management Studio
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id: 092bc4b9-3d1d-43b4-a6b4-8c8acd83522f
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level: high
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logsource:
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category: image_load
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product: windows
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modified: 2021/11/11
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references:
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- https://adsecurity.org/?p=2921
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- https://github.com/p3nt4/PowerShdll
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related:
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- id: 867613fb-fa60-4497-a017-a82df74a172c
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type: obsoletes
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status: experimental
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tags:
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- attack.t1086
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- attack.t1059.001
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- attack.execution
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yml_filename: sysmon_in_memory_powershell.yml
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yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/image_load
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