SecretsDump File Modification

 1title: SecretsDump File Modification
 2id: 88de04f6-c443-40ec-a592-72c31a55810b
 3status: experimental
 4description: |
 5    Impacket’s SecretsDump utility consistently involves the Windows Service Host 
 6    (svchost.exe) writing randomly named .tmp files to the System32 directory. The 
 7    following pseudo-detector should offer defenders a reliable method of detecting 
 8    Impacket's SecretsDump utility. Part of the RedCanary 2024 Threat Detection Report.    
 9references:
10    - https://redcanary.com/threat-detection-report/techniques/os-credential-dumping/
11author: RedCanary, Sigma formatting by Micah Babinski
12date: 2024/03/21
13tags:
14    - attack.credential_access
15    - attack.t1003
16logsource:
17    category: image_load
18    product: windows
19detection:
20    selection:
21        Image|endswith: '\svchost.exe'
22        ImageLoaded|endswith: '\regsvc.dll'
23        # TargetFilename|contains: 'windows\system32' # need to join file creation events on process id
24    condition: selection
25falsepositives:
26    - Unknown
27level: low```