Query: detect Detects suspicious Windows Defender Application Control (WDAC) policy file creation from abnormal processes that could b in logs
Matching passage: Sigma rule: Detects suspicious Windows Defender Application Control (WDAC) policy file creation from abnormal processes that could b. Logsource: windows / file_event. Rule: title: Potentially Suspicious WDAC Policy File Creation id: 1d2de8a6-4803-4fde-b85b-f58f3aa7a705 status: experimental description: 'Detects suspicious Windows Defender Application Control (WDAC) policy file creation from abnormal processes that could be abused by attacker to block EDR/AV components while allowing their own malicious code to run on the system. ' references: - https://learn.microsoft.com/en-us/windows/security/application-security/application-control/app-control-for-business/deployment/deploy-appcontrol-policies-using-group-policy - https://beierle.win/2024-12-20-Weaponizing-WDAC-Killing-the-Dreams-of-EDR/ - https://learn.microsoft.com/en-us/windows/security/application-security/application-control/app-control-for-business/deployment/appcontrol-deployment-guide - https://learn.microsoft.com/en-us/windows/security/application-security/application-control/app-control-for-business/deployment/deploy-appcontrol-policies-with-script - https://learn.microsoft.com/en-us/windows/security/application-security/application-control/app-control-for-business/deployment/deploy-appcontrol-policies-with-memcm author: X__Junior date: 2025-02-07 modified: 2026-05-18 tags: - attack.defense-impairment logsource: category: file_event product: windows detection: selection_target: TargetFilename|contains: \Windows\System32\CodeIntegrity\ filter_main_images: Image|endswith: - \Microsoft.ConfigurationManagement.exe - \WDAC Wizard.exe - C:\Program Files\PowerShell\7-preview\pwsh.exe - C:\Program Files\PowerShell\7\pwsh.exe - C:\Windows\System32\dllhost.exe - C:\Windows\System32\WindowsPowerShell\v1.0\powershell_ise.exe - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe - C:\Windows\SysWOW64\dllhost.exe - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell_ise.exe - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe filter_main_cli: - CommandLine|contains|all: - ConvertFrom-CIPolicy -XmlFilePath - '-BinaryFilePath ' - CommandLine|contains: CiTool --update-policy - CommandLine|contains|all: - Copy-Item -Path - -Destination filter_main_system: Image: System filter_main_wuauclt: Image: C:\Windows\System32\wuauclt.exe filter_main_wuaucltcore: Image: - C:\Windows\UUS\arm64\wuaucltcore.exe - C:\Windows\UUS\Packages\Preview\arm64\wuaucltcore.exe condition: selection_target and not 1 of filter_main_* falsepositives: - Administrators and security vendors could leverage WDAC, apply additional filters as needed. level: medium
Near-miss passage: Sigma rule: Detects signs of the WMI script host process "scrcons.exe" loading scripting DLLs which could indicates WMI ActiveScript. Logsource: windows / image_load. Rule: title: WMI ActiveScriptEventConsumers Activity Via Scrcons.EXE DLL Load id: b439f47d-ef52-4b29-9a2f-57d8a96cb6b8 status: test description: Detects signs of the WMI script host process "scrcons.exe" loading scripting DLLs which could indicates WMI ActiveScriptEventConsumers EventConsumers activity. references: - https://twitter.com/HunterPlaybook/status/1301207718355759107 - https://www.mdsec.co.uk/2020/09/i-like-to-move-it-windows-lateral-movement-part-1-wmi-event-subscription/ - https://threathunterplaybook.com/hunts/windows/200902-RemoteWMIActiveScriptEventConsumers/notebook.html author: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research) date: 2020-09-02 modified: 2023-02-22 tags: - attack.lateral-movement - attack.privilege-escalation - attack.persistence - attack.t1546.003 logsource: category: image_load product: windows detection: selection: Image|endswith: \scrcons.exe ImageLoaded|endswith: - \vbscript.dll - \wbemdisp.dll - \wshom.ocx - \scrrun.dll condition: selection falsepositives: - Legitimate event consumers - Dell computers on some versions register an event consumer that is known to cause false positives when brightness is changed by the corresponding keyboard button level: medium