DirLister Execution

Detect the usage of "DirLister.exe" a utility for quickly listing folder or drive contents. It was seen used by BlackCat ransomware to create a list of accessible directories and files.

Sigma rule (View on GitHub)

 1title: DirLister Execution
 2id: b4dc61f5-6cce-468e-a608-b48b469feaa2
 3status: test
 4description: Detect the usage of "DirLister.exe" a utility for quickly listing folder or drive contents. It was seen used by BlackCat ransomware to create a list of accessible directories and files.
 5references:
 6    - https://github.com/redcanaryco/atomic-red-team/blob/40b77d63808dd4f4eafb83949805636735a1fd15/atomics/T1083/T1083.md
 7    - https://news.sophos.com/en-us/2022/07/14/blackcat-ransomware-attacks-not-merely-a-byproduct-of-bad-luck/
 8author: frack113
 9date: 2022-08-20
10modified: 2023-02-04
11tags:
12    - attack.discovery
13    - attack.t1083
14logsource:
15    category: process_creation
16    product: windows
17detection:
18    selection:
19        - OriginalFileName: 'DirLister.exe'
20        - Image|endswith: '\dirlister.exe'
21    condition: selection
22falsepositives:
23    - Legitimate use by users
24level: low

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