Access To Potentially Sensitive Sysvol Files By Uncommon Application

 1title: Access To Potentially Sensitive Sysvol Files By Uncommon Application
 2id: d51694fe-484a-46ac-92d6-969e76d60d10
 3related:
 4    - id: 8344c19f-a023-45ff-ad63-a01c5396aea0
 5      type: derived
 6status: experimental
 7description: Detects file access requests to potentially sensitive files hosted on the Windows Sysvol share.
 8references:
 9    - https://github.com/vletoux/pingcastle
10author: frack113
11date: 2023/12/21
12tags:
13    - attack.credential_access
14    - attack.t1552.006
15logsource:
16    category: file_access
17    product: windows
18    definition: 'Requirements: Microsoft-Windows-Kernel-File ETW provider'
19detection:
20    selection:
21        FileName|startswith: '\\'
22        FileName|contains|all:
23            - '\sysvol\'
24            - '\Policies\'
25        FileName|endswith:
26            - 'audit.csv'
27            - 'Files.xml'
28            - 'GptTmpl.inf'
29            - 'groups.xml'
30            - 'Registry.pol'
31            - 'Registry.xml'
32            - 'scheduledtasks.xml'
33            - 'scripts.ini'
34            - 'services.xml'
35    filter_main_generic:
36        Image|startswith:
37            - ':\Program Files (x86)\'
38            - ':\Program Files\'
39            - ':\Windows\explorer.exe'
40            - ':\Windows\system32\'
41            - ':\Windows\SysWOW64\'
42    condition: selection and not 1 of filter_main_*
43falsepositives:
44    - Unknown
45level: medium