Bypassing Security Controls - Command Shell

 1title: Bypassing Security Controls - Command Shell
 2id: 2aaf3922-0a8b-4b7b-9c10-ea552bdff707
 3status: experimental
 4description: |
 5    Adversaries bypass controls using the Windows Command Shell in a plethora of ways, 
 6    but you can detect the one we see most often with a simple combination of process 
 7    execution and a corresponding command line. Part of the RedCanary 2024 Threat 
 8    Detection Report.    
 9references:
10    - https://redcanary.com/threat-detection-report/techniques/windows-command-shell/
11author: RedCanary, Sigma formatting by Micah Babinski
12date: 2024/03/21
13tags:
14    - attack.execution
15    - attack.t1059
16    - attack.t1059.003
17    - attack.defense_evasion
18    - attack.t1202
19logsource:
20    category: process_creation
21    product: windows
22detection:
23    selection:
24        Image|endswith: '\cmd.exe'
25        CommandLine|contains:
26            - 'bypass'
27            - '-exec'
28    condition: selection
29falsepositives:
30    - Unknown
31level: low```