2020-05-21 22:50:37 +00:00
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title: CrackMapExec PowerShell Obfuscation
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id: 6f8b3439-a203-45dc-a88b-abf57ea15ccf
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status: experimental
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description: The CrachMapExec pentesting framework implements a PowerShell obfuscation with some static strings detected by this rule.
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references:
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- https://github.com/byt3bl33d3r/CrackMapExec
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- https://github.com/byt3bl33d3r/CrackMapExec/blob/0a49f75347b625e81ee6aa8c33d3970b5515ea9e/cme/helpers/powershell.py#L242
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tags:
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- attack.execution
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2020-06-16 20:46:08 +00:00
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- attack.t1059.001
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2020-09-05 17:35:21 +00:00
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- attack.defense_evasion
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- attack.t1027.005
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- attack.t1027 # an old one
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- attack.t1086 # an old one
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2020-05-21 22:50:37 +00:00
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author: Thomas Patzke
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date: 2020/05/22
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logsource:
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category: process_creation
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product: windows
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detection:
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powershell_execution:
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CommandLine|contains: 'powershell.exe'
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snippets:
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CommandLine|contains:
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- 'join*split'
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# Line 343ff
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- "( $ShellId[1]+$ShellId[13]+'x')"
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- '( $PSHome[*]+$PSHOME[*]+'
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- "( $env:Public[13]+$env:Public[5]+'x')"
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- "( $env:ComSpec[4,*,25]-Join'')"
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- "[1,3]+'x'-Join'')"
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condition: powershell_execution and snippets
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fields:
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- ComputerName
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- User
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- CommandLine
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falsepositives:
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- Unknown
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level: high
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