Sigma detection rules, expert-reviewed

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 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.

Windows Registry: Change to Services\WinSock2\Parameters\AutodialDLL for DLL Persistence

Alerts on registry changes to AutodialDLL under WinSock2 parameters that may enable DLL-based persistence.

Windows Registry App Paths Default Property Change Using Suspicious Values

Alerts on Windows App Paths registry edits to (Default)/Path with suspicious binaries, scripts, or temp/public locations.

Windows Startup Folder File Creation with Suspicious Script/Executable Extensions

Alerts on creation of startup-folder files with script/executable extensions commonly used for logon persistence on Windows.

Windows Registry Persistence via MyComputer \"Default\" Value Modification

Detects changes to Explorer\MyComputer (Default) registry value that can redirect a launched binary for persistence.

Windows Persistence Attempt via ErrorHandler.cmd in C:\WINDOWS\Setup\Scripts\

Alerts on writing ErrorHandler.cmd to C:\WINDOWS\Setup\Scripts\, a persistence-relevant location on Windows.

Windows file creation for SharpHound/BloodHound collection output filenames

Flags SharpHound/BloodHound default collection export files (zip and multiple JSON datasets) from Windows file events.

Windows SafeBoot Registry Key Deletion via reg.exe Command-Line

Flags reg.exe deleting the \SYSTEM\CurrentControlSet\Control\SafeBoot registry key via command line.

Windows mshta.exe launched with URL-based arguments (http/https/ftp)

Alerts when mshta.exe is executed with HTTP/HTTPS/FTP URLs in the command line, consistent with remote HTA execution.

Windows Registry Persistence: DbgManagedDebugger Debugger Value Added

Alerts on registry sets that add a Debugger value under DbgManagedDebugger, indicating potential crash-triggered persistence.

Windows Process Creation: Detect Use of 8.3 Short Name in Image Path (~1/~2)

Alerts on Windows process launches whose Image path contains 8.3 short-name markers (~1\ or ~2\), excluding several known benign parents.

Windows Registry RDP Terminal Services Sensitive Settings Tampering

Flags Windows registry changes to sensitive RDP/Terminal Services settings such as shadowing, remote assistance, security, and InitialProgram.

Windows Process Creation: Image contains NTFS 8.3 short filename patterns

Flags process creation events where the Image contains Windows 8.3 short-name patterns (e.g., ~1.exe, ~2.ps1) to evade image-based detections.

Windows Exploit Guard Controlled Folder Access: Added Allowed Application for Blocked Path

Alerts when an app is added to Exploit Guard’s AllowedApplications list to bypass controlled folder restrictions for risky paths.