Processes Executing with Unusual Command Lines (RedCanary Threat Detection Report)

 1title: Processes Executing with Unusual Command Lines (RedCanary Threat Detection Report)
 2id: 23aafdd3-8476-49a0-8377-54d26bf7847f
 3status: experimental
 4description: |
 5    Detects non-powershell.exe processes executing with command lines that are usually 
 6    associated with powershell. This is an example for demonstration purposes only. 
 7    Part of the RedCanary 2023 Threat Detection Report.    
 8references:
 9    - https://redcanary.com/threat-detection-report/techniques/rename-system-utilities/
10author: RedCanary, Sigma formatting by Micah Babinski
11date: 2023/05/10
12tags:
13    - attack.defense_evasion
14    - attack.t1036.003
15logsource:
16    category: process_creation
17    product: windows
18detection:
19    selection:
20        CommandLine|contains:
21            - 'iex'
22            - 'invoke-expression'
23    filter_pwsh:
24        Image|endswith: '\powershell.exe'
25    condition: selection and not filter_pwsh
26falsepositives:
27    - Unknown
28level: low```