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Tamper Windows Defender Remove-MpPreference

Detects attempts to remove Windows Defender configurations using the 'MpPreference' cmdlet

MITRE ATT&CK

Detection Query

selection_remove:
  CommandLine|contains: Remove-MpPreference
selection_tamper:
  CommandLine|contains:
    - "-ControlledFolderAccessProtectedFolders "
    - "-AttackSurfaceReductionRules_Ids "
    - "-AttackSurfaceReductionRules_Actions "
    - "-CheckForSignaturesBeforeRunningScan "
condition: all of selection_*

Author

Nasreddine Bencherchali (Nextron Systems)

Created

2022-08-05

Data Sources

windowsProcess Creation Events

Platforms

windows

References

https://techcommunity.microsoft.com/t5/core-infrastructure-and-security/windows-10-controlled-folder-access-event-search/ba-p/2326088

Tags

attack.defense-impairmentattack.t1685

Raw Content

title: Tamper Windows Defender Remove-MpPreference
id: 07e3cb2c-0608-410d-be4b-1511cb1a0448
related:
    - id: ae2bdd58-0681-48ac-be7f-58ab4e593458
      type: similar
status: test
description: Detects attempts to remove Windows Defender configurations using the 'MpPreference' cmdlet
references:
    - https://techcommunity.microsoft.com/t5/core-infrastructure-and-security/windows-10-controlled-folder-access-event-search/ba-p/2326088
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-08-05
tags:
    - attack.defense-impairment
    - attack.t1685
logsource:
    product: windows
    category: process_creation
detection:
    selection_remove:
        CommandLine|contains: 'Remove-MpPreference'
    selection_tamper:
        CommandLine|contains:
            - '-ControlledFolderAccessProtectedFolders '
            - '-AttackSurfaceReductionRules_Ids '
            - '-AttackSurfaceReductionRules_Actions '
            - '-CheckForSignaturesBeforeRunningScan '
    condition: all of selection_*
falsepositives:
    - Legitimate PowerShell scripts
level: high