Sigma detection rules, expert-reviewed

Windows Visual Basic vbc.exe Compiles to .obj via cvtres.exe Resource Converter

Alerts when vbc.exe spawns cvtres.exe during Windows VB command-line compilation activity.

Windows regedit.exe exports a registry key into an alternate data stream

Flags regedit.exe executions where the process image ends with '\regedit.exe', consistent with exporting Registry data to an alternate data stream.

PowerShell Service Persistence via Registry ImagePath on Windows

Flags Windows registry service ImagePath entries that reference PowerShell (powershell/pwsh).

Windows: Time Travel Debugging Utility (tttracer.exe) Process Execution

Alerts when tttracer.exe is the parent process of a spawned process on Windows.

PowerShell Script Block WinAPI Calls Indicative of Injection or Token Abuse (Windows)

Detects PowerShell ScriptBlocks containing WinAPI function-name combinations consistent with injection and token manipulation.

Windows UAC Bypass via dism.exe Loading Fake dismcore.dll

Alerts when dism.exe loads a dismcore.dll that is not the expected System32 Dism DLL.

Windows Time Travel Debugging DLL Loads (ttdrecord/ttdwriter/ttdloader)

Flags Windows image loads of Time Travel Debugging Utility DLLs (tdrecord/tdwriter/tdloader), often abused for stealthy credential dumping.

Windows PowerShell Remote Thread Into lsass.exe Suggesting Credential Dumping

Alerts when PowerShell creates a remote thread into lsass.exe, indicating possible credential dumping on Windows.

PowerShell Script Execution via Windows Service Creation (Service Control Manager)

Flags service creation/start events where the service ImagePath references PowerShell (powershell/pwsh).

Windows Service Creation of PowerShell/Pwsh Scripts (Security EID 4697)

Alerts on service creation events where the service executable name includes powershell or pwsh.

Non-privileged reg.exe or PowerShell registry service configuration changes on Windows

Flags non-admin reg.exe or PowerShell activity targeting service registry configuration paths on Windows.

Windows Process Creation: Hydra Password Bruteforce Command-Line Parameters

Alerts when Windows process command lines include Hydra -u/-p parameters with USER/PASS placeholders.

Windows COM Hijack by Registry DelegateExecute Modification (HKCU Classes Folder\shell\open\command)

Flags HKCU DelegateExecute registry changes for COM hijack style persistence under the Folder shell open command.

Detect Wannacry killswitch DNS queries to hardcoded domains

Flags DNS lookups for known WannaCry killswitch domain strings and variants.

Windows NetLogon Secure Channel Connection Allowed for Vulnerable Client

Alerts on Windows NetLogon ETW events indicating an allowed secure channel connection (Event ID 5829).