Sigma detection rules, expert-reviewed

Windows ImageLoad: Uncommon Process Loads RstrtMgr.dll (Restart Manager)

Alerts on non-standard processes loading RstrtMgr.dll using Windows image load telemetry.

Windows Image Load of RstrtMgr.dll by Suspicious Path or User Content

Alerts on RstrtMgr.dll loading from suspicious path contexts using Windows image load telemetry.

Python-Based Tool LSASS Process Access for Credential Dumping (Windows)

Alerts on process-access attempts to lsass.exe with a Python-related call trace and high granted access.

Windows HackTool Process Access: Detect Access by Common Tool Image Names

Alerts on Windows process access events initiated by processes whose image names match common credential/dumping hack tools.

wusa.exe Execution with Parent in Suspicious Windows Paths

Alerts when wusa.exe is spawned by a parent running from common suspicious Windows directories, excluding .msu-related noise.

Windows Registry IME File Value Used from Suspicious Paths

Alerts on Windows keyboard layout "Ime File" registry entries pointing to suspicious writable directory paths.

Windows Registry: Uncommon IME File Value in Keyboard Layouts Path

Alerts on Control\Keyboard Layouts\ registry values named "Ime File" that reference non-.ime extensions.

Windows Network Connections to Visual Studio Code Tunnels Domain

Alerts on initiated network connections to .tunnels.api.visualstudio.com from a Windows process.

Windows Network Connections to *.devtunnels.ms

Alerts on initiated Windows network connections to .devtunnels.ms hostnames, which may indicate remote access use.

Windows Process Creation: Excel DCOM Child Processes Linked to ActivateMicrosoftApp

Alerts when excel.exe spawns foxprow.exe, schdplus.exe, or winproj.exe, consistent with suspicious Excel DCOM automation activity.

Windows: Command-Line Use of ms-appinstaller Protocol Handler for File Downloads

Alerts on Windows command lines invoking ms-appinstaller with an http source, indicating potential remote file download behavior.

Windows msxsl.exe Execution with HTTP Keyword in Command Line

Flags execution of msxsl.exe when the command line includes an HTTP URL indicator.

Windows: File Download via msedge_proxy.exe Using HTTP/HTTPS URLs

Flags msedge_proxy.exe executions that include HTTP/HTTPS URLs, consistent with arbitrary file downloads.

Windows Process Creation: Detect IMEWDBLD.EXE Downloading Files via HTTP/HTTPS

Alerts when IMEWDBLD.exe runs with an HTTP/HTTPS URL, indicating arbitrary file downloads.

Windows Registry: Disabling Antivirus Filter Driver on Dev Drive via FltmgrDevDriveAllowAntivirusFilter

Detects registry changes disabling antivirus minifilter inspection on a Dev Drive by setting the allow setting to 0x0.