Detectionmediumtest
Access To Potentially Sensitive Sysvol Files By Uncommon Applications
Detects file access requests to potentially sensitive files hosted on the Windows Sysvol share.
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Log Source
Windowsfile_access
ProductWindows← raw: windows
Categoryfile_access← raw: file_access
Definition
Requirements: Microsoft-Windows-Kernel-File ETW provider
Detection Logic
Detection Logic3 selectors
detection:
selection:
FileName|startswith: '\\'
FileName|contains|all:
- '\sysvol\'
- '\Policies\'
FileName|endswith:
- 'audit.csv'
- 'Files.xml'
- 'GptTmpl.inf'
- 'groups.xml'
- 'Registry.pol'
- 'Registry.xml'
- 'scheduledtasks.xml'
- 'scripts.ini'
- 'services.xml'
filter_main_generic:
Image|startswith:
- 'C:\Program Files (x86)\'
- 'C:\Program Files\'
- 'C:\Windows\system32\'
- 'C:\Windows\SysWOW64\'
filter_main_explorer:
Image: 'C:\Windows\explorer.exe'
condition: selection and not 1 of filter_main_*False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
References
MITRE ATT&CK
Tactics
Sub-techniques
Rule Metadata
Rule ID
d51694fe-484a-46ac-92d6-969e76d60d10
Status
test
Level
medium
Type
Detection
Created
Thu Dec 21
Modified
Mon Jul 29
Author
Path
rules/windows/file/file_access/file_access_win_susp_gpo_files.yml
Raw Tags
attack.credential-accessattack.t1552.006