Suspicious Powershell Commandlets (RedCanary Threat Detection Report)

 1title: Suspicious Powershell Commandlets (RedCanary Threat Detection Report)
 2id: 68490f55-bf8d-489d-995a-5ceae34ce215
 3status: experimental
 4description: Detects the execution of powershell.exe with suspicious cmdlets or options. Part of the RedCanary 2023 Threat Detection Report.
 5references:
 6    - https://redcanary.com/threat-detection-report/techniques/powershell/
 7author: RedCanary, Sigma formatting by Micah Babinski
 8date: 2023/05/10
 9tags:
10    - attack.execution
11    - attack.t1059.001
12logsource:
13    category: process_creation
14    product: windows
15detection:
16    selection:
17        Image|endswith: '\powershell.exe'
18        CommandLine|contains:
19            - '-nop'
20            - '-noni'
21            - 'invoke-expression'
22            - 'iex'
23            - '.downloadstring'
24            - 'downloadfile'
25    condition: selection
26falsepositives:
27    - Unknown
28level: low```

References

• PowerShell - Red Canary Threat Detection Report

  

  PowerShell reclaimed its place as the most prevalent technique we detected in 2023, as adversaries continue to abuse the framework.

  
  Read More

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