IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

« Interactive Terminal Spawned via Python Kerberos Cached Credentials Dumping »

› › ›

KRBTGT Delegation Backdoor

edit

IMPORTANT: This documentation is no longer updated. Refer to Elastic's version policy and the latest documentation.

KRBTGT Delegation Backdoor

edit

Identifies the modification of the msDS-AllowedToDelegateTo attribute to KRBTGT. Attackers can use this technique to maintain persistence to the domain by having the ability to request tickets for the KRBTGT service.

Rule type: query

Rule indices:

winlogbeat-*
logs-system.*

Severity: high

Risk score: 73

Runs every: 5 minutes

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

Elastic
Host
Windows
Threat Detection
Persistence
Active Directory

Version: 4 (version history)

Added (Elastic Stack release): 8.1.0

Last modified (Elastic Stack release): 8.4.0

Rule authors: Elastic

Rule license: Elastic License v2

Investigation guide

edit

Rule query

edit

event.action:modified-user-account and event.code:4738 and
winlog.event_data.AllowedToDelegateTo:*krbtgt*

Threat mapping

edit

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Persistence
- ID: TA0003
- Reference URL: https://attack.mitre.org/tactics/TA0003/
Technique:
- Name: Account Manipulation
- ID: T1098
- Reference URL: https://attack.mitre.org/techniques/T1098/
Tactic:
- Name: Credential Access
- ID: TA0006
- Reference URL: https://attack.mitre.org/tactics/TA0006/
Technique:
- Name: Steal or Forge Kerberos Tickets
- ID: T1558
- Reference URL: https://attack.mitre.org/techniques/T1558/

Rule version history

edit

Version 4 (8.4.0 release)

Formatting only

Version 2 (8.2.0 release)

Formatting only

« Interactive Terminal Spawned via Python Kerberos Cached Credentials Dumping »