Windows Defender Exclusion List Modified

 Original Source: [Sigma source]
Title: Windows Defender Exclusion List Modified
Status: test
Description:Detects modifications to the Windows Defender exclusion registry key. This could indicate a potentially suspicious or even malicious activity by an attacker trying to add a new exclusion in order to bypass security.
References:
  -https://www.bleepingcomputer.com/news/security/gootkit-malware-bypasses-windows-defender-by-setting-path-exclusions/
Author: @BarryShooshooga
Date: 2019-10-26
modified:2023-11-11
Tags:
  • -'attack.defense-impairment'
  • -'attack.t1685'
Logsource:
  • product: windows
  • service: security
  • definition: Requirements: Audit Policy : Security Settings/Local Policies/Audit Policy, Registry System Access Control (SACL): Auditing/User
Detection:
  selection:
    EventID: '4657'
    ObjectName|contains: '\Microsoft\Windows Defender\Exclusions\'
  condition:selection
Falsepositives:
  -Intended exclusions by administrators
Level: medium