Detection rules › Sigma
VSSAudit Security Event Source Registration
Detects the registration of the security event source VSSAudit. It would usually trigger when volume shadow copy operations happen.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Credential Access | T1003.002 OS Credential Dumping: Security Account Manager |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Security-Auditing | Event ID 4904 | An attempt was made to register a security event source. |
| Security-Auditing | Event ID 4905 | An attempt was made to unregister a security event source. |
Rule body yaml
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
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
AuditSourceName: VSSAudit
EventID:
- 4904
- 4905
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
AuditSourceName | eq |
|