Sigma detection rules, expert-reviewed

Windows rundll32 Loading Renamed comsvcs.dll via DLL Image Load

Flags rundll32.exe loading a renamed comsvcs.dll module consistent with process memory dumping behavior on Windows.

Windows Shell-Core: Installed Application Shortcut Indicators for Known Tools

Flags suspicious installation-style activity in Windows shell-core based on EventID 28115 app resolver cache entries for specific tools.

Windows: Detect ESENT New Database Created with ntds.dit Written to Suspicious Path

Identifies ESENT EventID 325 where a new database containing ntds.dit is created in suspicious locations.

Windows ntdsutil Abuse Indicators via ESENT Events Containing ntds.dit

Flags ESENT application events mentioning ntds.dit that may indicate ntdsutil attempts to access the AD database.

PUA Tool Update Check to /checkupdate.php (Advanced IP/Port Scanner) via Proxy

Identifies proxy HTTP requests to /checkupdate.php from Advanced IP/Port Scanner with expected update-check query parameters.

Windows: Unusual Process Tree for wab.exe and wabmig.exe

Alert on abnormal parent/child process relationships involving wab.exe and wabmig.exe in Windows process creation logs.

Windows Process Creation: wab.exe or wabmig.exe Run from Non-Default Paths

Alerts when wab.exe or wabmig.exe run from unexpected directories on Windows.

Windows: User Added to Local Administrators Group via Net or Add-LocalGroupMember

Flags Windows command lines that add a user to the local administrators group via net.exe or Add-LocalGroupMember.

Windows: findstr.exe LSASS keyword matching for process reconnaissance

Alert on find.exe/findstr.exe command lines containing "lsass", indicating potential LSASS-focused reconnaissance.

Windows file write events where executables save files with suspicious script/binary extensions

Alerts when common Windows system executables write files ending in suspicious extensions like .ps1, .bat, .vbs, or .hta.

Windows Malicious iphlpapi.dll Dropped in OneDrive/Teams AppData Directory

Flags creation of iphlpapi.dll in the Microsoft AppData area used by OneDrive/Teams, consistent with DLL sideloading attempts.

Windows File Creation Time Altered to a Previous Year

Alerts on Windows events where a file’s creation time is altered to a different year, excluding common benign system/update tooling.

Webserver POST to SAAS/jersey manager API migrate tenant (Workspace ONE Access RCE pattern)

Alerts on POST requests to the Workspace ONE Access tenant migration API endpoint associated with CVE-2022-31659.

Webserver URI Probe for Workspace ONE Access Auth Bypass Attempt (CVE-2022-31656)

Alerts on webserver requests to Workspace ONE Access containing a URI query pattern linked to CVE-2022-31656 exploitation.

Windows Service Installation of AnyDesk Software (Service Control Manager 7045)

Flags Windows service creation where AnyDesk appears in the service name and ImagePath via SCM Event ID 7045.