SigmaHQ/rules/windows/builtin/win_vssaudit_secevent_source_registration.yml

title: VSSAudit Security Event Source Registration
id: e9faba72-4974-4ab2-a4c5-46e25ad59e9b
description: Detects the registration of the security event source VSSAudit. It would usually trigger when volume shadow copy operations happen.
status: experimental
date: 2020/10/20
author: Roberto Rodriguez @Cyb3rWard0g, Open Threat Research (OTR)
tags:
    - attack.credential_access
    - attack.t1003.002
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1003.002/T1003.002.md#atomic-test-3---esentutlexe-sam-copy
logsource:
    product: windows
    service: security
detection:
    selection_one: 
        EventID: 4904
        AuditSourceName: VSSAudit
    selection_two: 
        EventID: 4905
        AuditSourceName: VSSAudit
    condition: selection_one or selection_two
falsepositives:
    - Legitimate use of VSSVC. Maybe backup operations. It would usually be done by C:\Windows\System32\VSSVC.exe.
level: medium