Protected Storage Service Access — Sigma Rule

Rule metadata and linked tags

Author: Roberto Rodriguez @Cyb3rWard0g. Source status: test; severity: high. Source dates: 2019-08-10 / 2021-11-27.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 06633d3870de8b27f2ce5718ba07c6cca2778e3fe3b2caaf02d741e8506a51e0

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: Protected Storage Service Access
id: 45545954-4016-43c6-855e-eae8f1c369dc
status: test
description: Detects access to a protected_storage service over the network. Potential abuse of DPAPI to extract domain backup keys from Domain Controllers
references:
    - https://threathunterplaybook.com/hunts/windows/190620-DomainDPAPIBackupKeyExtraction/notebook.html
author: Roberto Rodriguez @Cyb3rWard0g
date: 2019-08-10
modified: 2021-11-27
tags:
    - attack.lateral-movement
    - attack.t1021.002
logsource:
    product: windows
    service: security
detection:
    selection:
        EventID: 5145
        ShareName|contains: 'IPC'
        RelativeTargetName: 'protected_storage'
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://threathunterplaybook.com/hunts/windows/190620-DomainDPAPIBackupKeyExtraction/notebook.html