Sigma detection rules, expert-reviewed

Windows AMSI Disabled by Registry Value Modification (AmsiEnable)

Alerts when Windows Script Settings AmsiEnable is set to 0x00000000 to disable AMSI.

Windows Process Creation: Registry Modification to Disable ETW AutoLogger via reg.exe or PowerShell

Flags reg.exe or PowerShell registry changes aimed at disabling WMI AutoLogger EventLog session components.

Windows Process Command-Line Tampering of AMSI Registry Values via reg.exe or PowerShell

Alerts on reg.exe or PowerShell command lines attempting to add/set AMSI enable registry settings.

Windows File Events: Legitimate Applications Writing Executables to Uncommon Locations

Alerts when selected Windows binaries write files to typically uncommon directories such as Temp, ProgramData, AppData, or system areas.

Linux process creation: suspicious child processes launched by Node.js server command execution

Flags Linux processes where a Node.js server child-process pattern launches suspicious shell/command tooling.

Windows Process Creation: npm install for Shai-Hulud 2.0 Malicious Package Names and Versions

Alert on Windows node.exe running npm install with command-line package/version strings known from the Shai-Hulud 2.0 npm campaign.

Linux Process Creation: npm install of Shai-Hulud 2.0 malicious packages by name and version

Alerts on Linux npm install commands referencing known Shai-Hulud 2.0 malicious package versions.

Windows Schtasks Execution with Renamed schtasks.exe Binary

Alerts on scheduled task management commands that use a renamed schtasks.exe binary on Windows.

Windows Process Access: WerFaultSecure accessing MsMpEng with dbgcore.dll/dbghelp.dll call traces

Alerts on WerFaultSecure.exe accessing MsMpEng.exe with dbgcore/dbghelp DLLs in the call trace.

Windows suspicious access to LSASS.exe with dbgcore.dll/dbghelp.dll call trace from uncommon paths

Alerts on suspicious LSASS access from unusual locations when dbgcore.dll or dbghelp.dll appears in the call trace.

Windows Image Load: dbgcore.dll/dbghelp.dll Loaded from Uncommon User and System Paths

Alerts when dbgcore.dll or dbghelp.dll is loaded from user or other uncommon directories on Windows.

AWS CloudTrail GuardDuty Detector Deleted or Disabled via UpdateDetector

Identifies successful GuardDuty detector deletion or disablement from CloudTrail, reducing GuardDuty monitoring coverage.

Windows Process Creation: Grixba Reconnaissance Tool Command-Line Parameter Combination

Alerts on Windows command lines containing Grixba-like mode/input/scan parameter combinations during reconnaissance.

Windows Script Interpreter Launching trufflehog or gitleaks Credential Scanner

Flags node.exe or bun.exe spawning trufflehog/gitleaks to perform secret or credential scanning.

Windows: Suspicious Script/Command Child Processes Spawned by ArcSOC.exe

Alerts when ArcSOC.exe launches cmd/cscript/mshta/powershell/wscript and similar interpreters, indicating potential remote code execution.