File And SubFolder Enumeration Via Dir Command

Detects usage of the "dir" command part of Widows CMD with the "/S" command line flag in order to enumerate files in a specified directory and all subdirectories.

Sigma rule (View on GitHub)

 1title: File And SubFolder Enumeration Via Dir Command
 2id: 7c9340a9-e2ee-4e43-94c5-c54ebbea1006
 3status: test
 4description: |
 5        Detects usage of the "dir" command part of Widows CMD with the "/S" command line flag in order to enumerate files in a specified directory and all subdirectories.
 6references:
 7    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1217/T1217.md
 8author: frack113
 9date: 2021-12-13
10modified: 2024-04-14
11tags:
12    - attack.discovery
13    - attack.t1217
14logsource:
15    category: process_creation
16    product: windows
17detection:
18    selection_cmd:
19        - Image|endswith: '\cmd.exe'
20        - OriginalFileName: Cmd.Exe
21    selection_cli:
22        CommandLine|contains|windash: 'dir*-s'
23    condition: all of selection_*
24falsepositives:
25    - Likely
26level: low

References

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