Suspicious Powershell Cmdlets

 1title: Suspicious Powershell Cmdlets
 2id: b3dfac86-1056-4b6b-9c67-db4a10a9e812
 3status: experimental
 4description: Looks for look for cmdlets, methods, and switches that may indicate malicious
 5    activity. Inspired by the 2022 Red Canary Threat Detection report.
 6references:
 7    - https://redcanary.com/threat-detection-report/techniques/powershell/
 8author: Micah Babinski
 9date: 2022/11/03
10tags:
11    - attack.execution
12    - attack.t1059
13    - attack.t1059.001
14logsource:
15    category: process_creation
16    product: windows
17detection:
18    selection:
19        Image|endswith: '\powershell.exe'
20        CommandLine|contains|windash:
21            - '-nop'
22            - '-noni'
23            - 'invoke-expression'
24            - 'iex'
25            - 'downloadstring'
26            - 'downloadfile'
27            - 'downloadata'
28    condition: selection
29falsepositives:
30    - Unknown
31level: high```