VSSAudit Security Event Source Registration — Sigma Rule

Rule metadata and linked tags

Author: Roberto Rodriguez @Cyb3rWard0g, Open Threat Research (OTR). Source status: test; severity: informational. Source dates: 2020-10-20 / 2022-04-28.

{
  "product": "windows",
  "service": "security"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 69d1a4727d1df48f17ab4cb96698a6a4b37e0de475f0d62f728938ac080f30f8

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: VSSAudit Security Event Source Registration
id: e9faba72-4974-4ab2-a4c5-46e25ad59e9b
status: test
description: Detects the registration of the security event source VSSAudit. It would usually trigger when volume shadow copy operations happen.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1003.002/T1003.002.md#atomic-test-3---esentutlexe-sam-copy
author: Roberto Rodriguez @Cyb3rWard0g, Open Threat Research (OTR)
date: 2020-10-20
modified: 2022-04-28
tags:
    - attack.credential-access
    - attack.t1003.002
logsource:
    product: windows
    service: security
detection:
    selection:
        AuditSourceName: VSSAudit
        EventID:
            - 4904
            - 4905
    condition: selection
falsepositives:
    - Legitimate use of VSSVC. Maybe backup operations. It would usually be done by C:\Windows\System32\VSSVC.exe.
level: informational

Original YAML and metadata in JSON

False positives

• Legitimate use of VSSVC. Maybe backup operations. It would usually be done by C:\Windows\System32\VSSVC.exe.

Source references

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1003.002/T1003.002.md#atomic-test-3---esentutlexe-sam-copy