Suspicious Get-ADDBAccount Usage — Sigma Rule

Rule metadata and linked tags

Author: Florian Roth (Nextron Systems). Source status: test; severity: high. Source dates: 2022-03-16 / not supplied.

{
  "product": "windows",
  "category": "ps_module",
  "definition": "0ad03ef1-f21b-4a79-8ce8-e6900c54b65b"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 5f44f97a5f2bbb62954c507124350cd44c0125edacb22a9a7b8018bb5af09000

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: Suspicious Get-ADDBAccount Usage
id: b140afd9-474b-4072-958e-2ebb435abd68
status: test
description: Detects suspicious invocation of the Get-ADDBAccount script that reads from a ntds.dit file and may be used to get access to credentials without using any credential dumpers
references:
    - https://www.n00py.io/2022/03/manipulating-user-passwords-without-mimikatz/
    - https://github.com/MichaelGrafnetter/DSInternals/blob/7ba59c12ee9a1cb430d7dc186a3366842dd612c8/Documentation/PowerShell/Get-ADDBAccount.md
author: Florian Roth (Nextron Systems)
date: 2022-03-16
tags:
    - attack.credential-access
    - attack.t1003.003
logsource:
    product: windows
    category: ps_module
    definition: 0ad03ef1-f21b-4a79-8ce8-e6900c54b65b
detection:
    selection:
        Payload|contains|all:
            - 'Get-ADDBAccount'
            - 'BootKey '
            - 'DatabasePath '
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://www.n00py.io/2022/03/manipulating-user-passwords-without-mimikatz/
• https://github.com/MichaelGrafnetter/DSInternals/blob/7ba59c12ee9a1cb430d7dc186a3366842dd612c8/Documentation/PowerShell/Get-ADDBAccount.md