Suspicious Disable Tamper Protection on Windows Defender (via registry_set)

title: Suspicious Disable Tamper Protection on Windows Defender (via registry_set)
id: db03aa4c-0492-54f8-939d-4f60e09d0723
status: stable
description: This rule detects disabling Windows Defender Tamper Protection
references:
    - https://attack.mitre.org/techniques/T1685/
    - https://www.tenforums.com/tutorials/123792-turn-off-tamper-protection-microsoft-defender-antivirus.html
author: Huntrule Team
date: 2026-07-07
tags:
    - attack.defense-impairment
    - attack.t1685
logsource:
    category: registry_set
    product: windows
detection:
    selection:
        TargetObject|contains: '\Microsoft\Windows Defender\Features\TamperProtection'
        Details: DWORD (0x00000000)
    filter_msmpeng_client:
        Image|startswith: 'C:\ProgramData\Microsoft\Windows Defender\Platform\'
        Image|endswith: '\MsMpEng.exe'
    filter_msmpeng_domain_controller:
        Image: 'C:\Program Files\Windows Defender\MsMpEng.exe'
    condition: selection and not 1 of filter_*
falsepositives:
    - Unknown
level: medium