SigmaHQ/rules/windows/powershell/powershell_tamper_with_windows_defender.yml

title: Tamper Windows Defender
id: ec19ebab-72dc-40e1-9728-4c0b805d722c
description: Attempting to disable scheduled scanning and other parts of windows defender atp.
status: experimental
tags:
    - attack.defense_evasion
    - attack.t1562.001
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1562.001/T1562.001.md
author: frack113
date: 2021/06/07
falsepositives:
    - Unknown
level: high
logsource:
    product: windows
    category: powershell-classic
detection:
    select_EventID:
        EventID: 600
    tamper_ps_action:
        HostApplication|contains: 'Set-MpPreference'
    tamper_ps_option:
        HostApplication|contains:
            - '-DisableRealtimeMonitoring 1'
            - '-DisableBehaviorMonitoring 1'
            - '-DisableScriptScanning 1'
            - '-DisableBlockAtFirstSeen 1'
    condition: select_EventID and tamper_ps_action and  tamper_ps_option