SigmaHQ/rules/windows/other/win_defender_bypass.yml

title: Windows Defender Exclusion Set
id: e9c8808f-4cfb-4ba9-97d4-e5f3beaa244d
description: 'Detects scenarios where an windows defender exclusion was added in registry where an entity would want to bypass antivirus scanning from windows defender'
references:
    - https://www.bleepingcomputer.com/news/security/gootkit-malware-bypasses-windows-defender-by-setting-path-exclusions/
tags:
    - attack.defense_evasion
    - attack.t1089           # an old one
    - attack.t1562.001
author: "@BarryShooshooga"
date: 2019/10/26
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
            - 4656
            - 4660
            - 4663
        ObjectName|contains: '\Microsoft\Windows Defender\Exclusions\'
    condition: selection
falsepositives:
    - Intended inclusions by administrator
level: high