Windows Binary Executed From WSL

 1title: Windows Binary Executed From WSL
 2id: ed825c86-c009-4014-b413-b76003e33d35
 3status: test
 4description: |
 5    Detects the execution of Windows binaries from within a WSL instance.
 6    This could be used to masquerade parent-child relationships    
 7references:
 8    - Internal Research
 9author: Nasreddine Bencherchali (Nextron Systems)
10date: 2023-02-14
11tags:
12    - attack.execution
13    - attack.defense-evasion
14    - attack.t1202
15logsource:
16    category: process_creation
17    product: windows
18detection:
19    selection:
20        Image|re: '[a-zA-Z]:\\'
21        CurrentDirectory|contains: '\\\\wsl.localhost' # Note: programs not supporting UNC paths (example: cmd.exe). Will default to another location
22    condition: selection
23falsepositives:
24    - Unknown
25level: medium