Sigma detection rules, expert-reviewed

Windows Regedit Exports Registry Hives to Files

Flags regedit.exe command lines exporting SYSTEM/SAM/SECURITY hives from HKLM to files.

Windows Process Creation: PowerShell or sc.exe Disabling Windows Defender Behavior Monitoring

Detects PowerShell flags or sc.exe service actions that disable WinDefend monitoring on Windows.

Windows Indirect Command Execution via Program Compatibility Assistant pcwrun.exe

Alerts on child processes spawned by pcwrun.exe, indicating indirect command execution via Program Compatibility Assistant.

Detect Obfuscated PowerShell Command Invocation via Stdin on Windows

Flags PowerShell-like command-line patterns indicating obfuscated execution using stdin or input substitution.

Windows Process Creation: AtBroker.exe Launching Assistive Technology Apps

Alerts on Windows process starts of AtBroker.exe with "start" that don’t match known built-in accessibility parameters.

PowerShell Obfuscation Delivered via Stdin Using Set-and-Invoke Pattern

Detects obfuscated PowerShell script blocks that use chained stdin/environment/input patterns.

PowerShell Module: Obfuscated Script Execution via Stdin Pattern

Detects obfuscated PowerShell module payloads using chained set and stdin/input invoke patterns.

Windows WMIPRVSE DLL Hijack via Network-Created wbemcomn.dll in System32\wbem

Flags wmiprvse.exe loading wbemcomn.dll from the System32\wbem directory, consistent with a WMI DLL hijack.

Windows DCOM InternetExplorer.Application DLL Hijack via iertutil.dll Image Load

Alerts when iexplore.exe loads iertutil.dll from an Internet Explorer path, indicating possible DLL hijacking.

Windows WMI DLL Hijack via Network-placed wbemcomn.dll in System32\wbem

Alerts when System creates wbemcomn.dll in C:\Windows\System32\wbem\, consistent with WMI DLL hijack file staging.

Windows DCOM InternetExplorer.Application iertutil.dll DLL Hijack Suspicion

Alerts when System writes iertutil.dll in the DCOM InternetExplorer.Application path, consistent with potential DLL hijacking.

Windows System: Service Control Manager runs command with obfuscated PowerShell keywords via set and stdin

Alerts on service creation where ImagePath includes obfuscation-like command chaining with environment/invoke/input strings.

Windows Security Log: Network Write of wbemcomn.dll in System32\wbem for WMI DLL Hijack (T1047)

Flags remote creation of wbemcomn.dll in System32\wbem associated with WMI DLL hijack activity.

Windows Security Event 4697: Obfuscated PowerShell Invocation Through Stdin

Alerts on Service creation events where the service command line includes stdin-style PowerShell obfuscation indicators.

Windows Security: Remote DCOM IE DLL Hijack via iertutil.dll in Internet Explorer path

Flags network file writes of iertutil.dll under IE’s Program Files path associated with potential DCOM DLL hijacking.