DPAPI Domain Master Key Backup Attempt — Sigma Rule

Rule metadata and linked tags

Author: Roberto Rodriguez @Cyb3rWard0g. Source status: test; severity: medium. Source dates: 2019-08-10 / 2023-03-15.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 9f7b0d30b8b20fd16f38c5c52b57a9db190fe9acceccfcfbe4dbc715c63e8355

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: DPAPI Domain Master Key Backup Attempt
id: 39a94fd1-8c9a-4ff6-bf22-c058762f8014
status: test
description: Detects anyone attempting a backup for the DPAPI Master Key. This events gets generated at the source and not the Domain Controller.
references:
    - https://threathunterplaybook.com/hunts/windows/190620-DomainDPAPIBackupKeyExtraction/notebook.html
author: Roberto Rodriguez @Cyb3rWard0g
date: 2019-08-10
modified: 2023-03-15
tags:
    - attack.credential-access
    - attack.t1003.004
logsource:
    product: windows
    service: security
detection:
    selection:
        EventID: 4692
    condition: selection
falsepositives:
    - If a computer is a member of a domain, DPAPI has a backup mechanism to allow unprotection of the data. Which will trigger this event.
level: medium

Original YAML and metadata in JSON

False positives

• If a computer is a member of a domain, DPAPI has a backup mechanism to allow unprotection of the data. Which will trigger this event.

Source references

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