Potential Delegated Managed Service Account (dMSA) Enumeration on Windows System

experimentalmedium
Log-Quelle: windows · securityAutor Panos Gkatziroulis, Swachchhanda Shrawan Poudel (Nextron Systems)Datum 2026-10-19
01

Beschreibung

Was dies ist, in Kürze.

Detects read operations performed on an Active Directory object of type msDS-DelegatedManagedServiceAccount (GUID 0feb936f-47b3-49f2-9386-1dedc2c23765), which is used for delegated Managed Service Accounts. Such access may indicate an attempt to gather information and leverage it for attacks like GoldendMSA.

02

Tags

attack.credential-accessattack.t1003.006attack.t1558.003
03

Regelquelle (YAML)

title: Potential Delegated Managed Service Account (dMSA) Enumeration on Windows System
id: 54f3cf8f-f577-46d9-b609-2029554e975d
status: experimental
description: |
    Detects read operations performed on an Active Directory object of type msDS-DelegatedManagedServiceAccount (GUID 0feb936f-47b3-49f2-9386-1dedc2c23765), which is used for delegated Managed Service Accounts.
    Such access may indicate an attempt to gather information and leverage it for attacks like GoldendMSA.
references:
    - https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-adsc/2c3e6e0a-134d-47e3-9ed5-edb71145def3
    - https://ipurple.team/2025/09/02/golden-dmsa/
    - https://www.semperis.com/blog/golden-dmsa-what-is-dmsa-authentication-bypass/
    - https://hacktricks.wiki/en/windows-hardening/active-directory-methodology/golden-dmsa-gmsa.html
author: Panos Gkatziroulis, Swachchhanda Shrawan Poudel (Nextron Systems)
date: 2026-10-19
tags:
    - attack.credential-access
    - attack.t1003.006
    - attack.t1558.003
logsource:
    product: windows
    service: security
    definition: |
        Requirements: Audit Directory Service Access auditing should be enabled.
        Auditing should be enabled for the organizational unit that contains the dMSAs for Authenticated Users.
detection:
    selection:
        # This rule should be applied after initial baselining according your environment.
        EventID: 4662
        ObjectType|contains: '0feb936f-47b3-49f2-9386-1dedc2c23765'
        AccessMask:
            - '0x100'
            - '0x10'
    filter:
        # Look for an account name that is not a DC
        SubjectUserName|expand: '%Domain_Controller%'
    condition: selection and not filter
falsepositives:
    - Legitimate administrative activities
level: medium
04

erkennt Techniken (2)

ATT&CK-Techniken, die dies ermöglicht oder abbildet.

05

Referenzen

Externe Belege — Patches, Meldungen, Analysen.