Powershell Inline Execution From A File

Detects inline execution of PowerShell code from a file

Sigma rule (View on GitHub)

 1title: Powershell Inline Execution From A File
 2id: ee218c12-627a-4d27-9e30-d6fb2fe22ed2
 3status: test
 4description: Detects inline execution of PowerShell code from a file
 5references:
 6    - https://speakerdeck.com/heirhabarov/hunting-for-powershell-abuse?slide=50
 7author: frack113
 8date: 2022-12-25
 9tags:
10    - attack.execution
11    - attack.t1059.001
12logsource:
13    product: windows
14    category: process_creation
15detection:
16    selection_exec:
17        CommandLine|contains:
18            - 'iex '
19            - 'Invoke-Expression '
20            - 'Invoke-Command '
21            - 'icm '
22    selection_read:
23        CommandLine|contains:
24            - 'cat '
25            - 'get-content '
26            - 'type '
27    selection_raw:
28        CommandLine|contains: ' -raw'
29    condition: all of selection_*
30falsepositives:
31    - Unknown
32level: medium

References

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