Query: rule covering Detects PowerShell scripts attempting to disable scheduled scanning and other parts of Windows Defender ATP or set defau
Matching passage: Sigma rule: Detects PowerShell scripts attempting to disable scheduled scanning and other parts of Windows Defender ATP or set defau. Logsource: windows / ps_script. Rule: title: Tamper Windows Defender - ScriptBlockLogging id: 14c71865-6cd3-44ae-adaa-1db923fae5f2 related: - id: ec19ebab-72dc-40e1-9728-4c0b805d722c type: derived status: test description: Detects PowerShell scripts attempting to disable scheduled scanning and other parts of Windows Defender ATP or set default actions to allow. references: - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1562.001/T1562.001.md - https://learn.microsoft.com/en-us/powershell/module/defender/set-mppreference?view=windowsserver2022-ps - https://bidouillesecurity.com/disable-windows-defender-in-powershell/ author: frack113, elhoim, Tim Shelton (fps, alias support), Swachchhanda Shrawan Poudel, Nasreddine Bencherchali (Nextron Systems) date: 2022-01-16 modified: 2024-01-02 tags: - attack.defense-impairment - attack.t1685 logsource: product: windows category: ps_script definition: 'Requirements: Script Block Logging must be enabled' detection: selection_options_disabling_preference: ScriptBlockText|contains: Set-MpPreference selection_options_disabling_function: ScriptBlockText|contains: - -dbaf $true - -dbaf 1 - -dbm $true - -dbm 1 - -dips $true - -dips 1 - -DisableArchiveScanning $true - -DisableArchiveScanning 1 - -DisableBehaviorMonitoring $true - -DisableBehaviorMonitoring 1 - -DisableBlockAtFirstSeen $true - -DisableBlockAtFirstSeen 1 - -DisableCatchupFullScan $true - -DisableCatchupFullScan 1 - -DisableCatchupQuickScan $true - -DisableCatchupQuickScan 1 - -DisableIntrusionPreventionSystem $true - -DisableIntrusionPreventionSystem 1 - -DisableIOAVProtection $true - -DisableIOAVProtection 1 - -DisableRealtimeMonitoring $true - -DisableRealtimeMonitoring 1 - -DisableRemovableDriveScanning $true - -DisableRemovableDriveScanning 1 - -DisableScanningMappedNetworkDrivesForFullScan $true - -DisableScanningMappedNetworkDrivesForFullScan 1 - -DisableScanningNetworkFiles $true - -DisableScanningNetworkFiles 1 - -DisableScriptScanning $true - -DisableScriptScanning 1 - -MAPSReporting $false - -MAPSReporting 0 - -drdsc $true - -drdsc 1 - -drtm $true - -drtm 1 - -dscrptsc $true - -dscrptsc 1 - -dsmndf $true - -dsmndf 1 - -dsnf $true - -dsnf 1 - -dss $true - -dss 1 selection_other_default_actions_allow: ScriptBlockText|contains: Set-MpPreference selection_other_default_actions_func: ScriptBlockText|contains: - HighThreatDefaultAction Allow - htdefac Allow - LowThreatDefaultAction Allow - ltdefac Allow - ModerateThreatDefaultAction Allow -
Near-miss passage: Sigma rule: Detects when the Windows Vulnerable Driver Blocklist is set to disabled. This setting is crucial for preventing the load. Logsource: windows / registry_set. Rule: title: Windows Vulnerable Driver Blocklist Disabled id: d526c60a-e236-4011-b165-831ffa52ab70 related: - id: 22154f0e-5132-4a54-aa78-cc62f6def531 type: similar status: experimental description: 'Detects when the Windows Vulnerable Driver Blocklist is set to disabled. This setting is crucial for preventing the loading of known vulnerable drivers, and its modification may indicate an attempt to bypass security controls. It is often targeted by threat actors to facilitate the installation of malicious or vulnerable drivers, particularly in scenarios involving Endpoint Detection and Response (EDR) bypass techniques. This rule applies to systems that support the Vulnerable Driver Blocklist feature, including Windows 10 version 1903 and later, and Windows Server 2022 and later. Note that this change will require a reboot to take effect, and this rule only detects the registry modification action. ' references: - https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/microsoft-recommended-driver-block-rules - https://www.sophos.com/en-us/blog/sharpening-the-knife-gold-blades-strategic-evolution - https://learn.microsoft.com/en-us/windows/security/application-security/application-control/app-control-for-business/design/microsoft-recommended-driver-block-rules author: Swachchhanda Shrawan Poudel (Nextron Systems) date: 2026-01-26 tags: - attack.defense-impairment - attack.t1685 logsource: category: registry_set product: windows detection: selection: TargetObject|endswith: \Control\CI\Config\VulnerableDriverBlocklistEnable Details: DWORD (0x00000000) condition: selection falsepositives: - Unlikely and should be investigated immediately. level: high regression_tests_path: regression_data/rules/windows/registry/registry_set/registry_set_vulnerable_driver_blocklist_disable/info.yml