Sigma detection rules, expert-reviewed

PowerShell Obfuscated stdin launcher using cmd /c or cmd /r patterns

Detects PowerShell script blocks that use obfuscated STDIN-driven cmd/powershell execution patterns.

PowerShell Module: Obfuscated Environment Variable Expansion via cmd /c set -f Pattern

Alerts when PowerShell module payloads obfuscate execution via cmd /c|/r and environment-variable-based set patterns.

PowerShell Module: Obfuscated STDIN Execution via cmd /c or cmd /r

Alerts when an obfuscated cmd->PowerShell payload uses stdin-style input and noexit/no-execution patterns.

Windows Service Control Manager: Obfuscated Environment Variable PowerShell via cmd /c set -f

Alerts on Service Control Manager event 7045 where a service ImagePath uses cmd /c|/r with "set" and -f formatting.

Windows System Service Control Manager spawning cmd with PowerShell and stdin input obfuscation

Flags SCM-created services whose ImagePath runs cmd to invoke PowerShell using stdin/input and -NoExit patterns.

Windows Security 4697: cmd.exe Launching Obfuscated PowerShell via Environment Variable Expansion

Alerts on EID 4697 service installation command lines containing obfuscated cmd.exe SET patterns used to execute PowerShell via environment variables.

Windows Security Event 4697 PowerShell Launch via cmd/stdin Obfuscation

Alerts on service creation events that run PowerShell through cmd with stdin-style obfuscation markers.

Linux: Grep used to search for passwords in files (auditd EXECVE)

Flags Linux process executions running grep with “password” in the command line.

Windows Script and LOLBins Loading .NET CLR DLLs via clr.dll, mscoree.dll, mscorlib.dll

Alerts when common scripting/execution binaries load .NET CLR DLLs like clr.dll and mscoree.dll on Windows.

Windows Registry-Based DLL Hijack via WAB.EXE Using WAB Registry DLLPath

Flags WAB.EXE DLLPath registry writes where the configured DLL path differs from the default.

Windows manage-bde.wsf via wscript/cscript Proxy Execution

Flags Windows process executions where wscript/cscript runs manage-bde.wsf, indicating potential proxy execution via LOLBIN.

Windows Process Command Line: Detect VAR++ LAUNCHER Obfuscated PowerShell

Flags Windows command lines showing VAR++ launcher-style obfuscated PowerShell execution through Invoke-Expression patterns.

Windows Process Creation: Obfuscated Cmd Uses clip.exe to Execute PowerShell

Alerts when cmd.exe uses obfuscated Clip.exe/clipboard calls to launch PowerShell.

Detect VAR++ LAUNCHER-Style Obfuscated PowerShell Command Block

Detects VAR++ LAUNCHER-like PowerShell obfuscation patterns in ScriptBlockText.

PowerShell Script Block Obfuscation via cmd/clipboard and clip.exe execution

Identifies obfuscated PowerShell script blocks launching clip.exe and chaining clipboard-related execution.