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WRITEDAC Access on Active Directory Objectedit

Identifies the access on an object with WRITEDAC permissions. With the WRITEDAC permission, the user can perform a Write Discretionary Access Control List (WriteDACL) operation, which is used to modify the access control rules associated with a specific object within Active Directory. Attackers may abuse this privilege to grant themselves or other compromised accounts additional rights, ultimately compromising the target object, resulting in privilege escalation, lateral movement, and persistence.

Rule type: query

Rule indices:

  • winlogbeat-*
  • logs-system.security*
  • logs-windows.*

Severity: low

Risk score: 21

Runs every: 60m

Searches indices from: now-119m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • Domain: Endpoint
  • OS: Windows
  • Use Case: Threat Detection
  • Tactic: Defense Evasion
  • Data Source: Active Directory
  • Use Case: Active Directory Monitoring
  • Rule Type: BBR

Version: 4

Rule authors:

  • Elastic

Rule license: Elastic License v2

Setupedit

Setup

The Audit Directory Service Access 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 >
DS Access >
Audit Directory Service Access (Success,Failure)

Rule queryedit

host.os.type: "windows" and event.action : ("Directory Service Access" or "object-operation-performed") and
  event.code : "4662" and winlog.event_data.AccessMask:"0x40000"

Framework: MITRE ATT&CKTM

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