Suspicious SYSVOL Domain Group Policy Access

Hunt Hypothesis

Detects Access to Domain Group Policies stored in SYSVOL

Detection Rule

Sigma (Original)

title: Suspicious SYSVOL Domain Group Policy Access
id: 05f3c945-dcc8-4393-9f3d-af65077a8f86
status: test
description: Detects Access to Domain Group Policies stored in SYSVOL
references:
    - https://adsecurity.org/?p=2288
    - https://www.hybrid-analysis.com/sample/f2943f5e45befa52fb12748ca7171d30096e1d4fc3c365561497c618341299d5?environmentId=100
author: Markus Neis, Jonhnathan Ribeiro, oscd.community
date: 2018-04-09
modified: 2022-01-07
tags:
    - attack.credential-access
    - attack.t1552.006
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains|all:
            - '\SYSVOL\'
            - '\policies\'
    condition: selection
falsepositives:
    - Administrative activity
level: medium

KQL (Azure Sentinel)

imProcessCreate
| where TargetProcessCommandLine contains "\\SYSVOL\\" and TargetProcessCommandLine contains "\\policies\\"

Required Data Sources

False Positive Guidance

• Administrative activity

MITRE ATT&CK Context

• Tactic: Credential Access
• Technique: T1552.006 — T1552.006

References

• https://adsecurity.org/?p=2288
• https://www.hybrid-analysis.com/sample/f2943f5e45befa52fb12748ca7171d30096e1d4fc3c365561497c618341299d5?environmentId=100
• SigmaHQ Rule