KRBTGT Delegation Backdooredit

Identifies the modification of the msDS-AllowedToDelegateTo attribute to Kerberos Ticket Granting Ticket (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: 5m

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

Maximum alerts per execution: 100



  • Elastic
  • Host
  • Windows
  • Threat Detection
  • Persistence
  • Active Directory

Version: 2

Rule authors:

  • Elastic

Rule license: Elastic License v2

Investigation guideedit

## Config

The 'Audit User Account Management' logging policy must be configured for (Success, Failure).
Steps to implement the logging policy with Advanced Audit Configuration:

Computer Configuration >
Policies >
Windows Settings >
Security Settings >
Advanced Audit Policies Configuration >
Audit Policies >
Account Management >
Audit User Account Management (Success,Failure)

Rule queryedit

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