Sigma detection rules, expert-reviewed

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 Print Executable Misuse via print.exe Command-Line

Flags suspicious print.exe invocations using /D and .exe, excluding command lines that explicitly contain print.exe.

Windows: Rundll32 LaunchApplication via pcwutl.dll

Flags rundll32.exe using pcwutl.dll to invoke LaunchApplication.

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 findstr.exe Subfolder and Case-Insensitive Search Flags

Alerts on findstr.exe executions that include both -s (subfolders) and -i (case-insensitive) flags.

Windows: SyncAppvPublishingServer.exe execution via PowerShell script block content

Flags PowerShell script blocks that reference SyncAppvPublishingServer.exe, indicating possible execution via a PowerShell-restricted workflow.

Windows SyncAppvPublishingServer Execution Triggering PowerShell Module Context

Alerts when SyncAppvPublishingServer.exe appears in PowerShell module ContextInfo on Windows.

Windows Security: Suspicious Remote Logon Using Explicit Credentials via Command-Line Tools

Flags EventID 4648 remote logons initiated by cmd/PowerShell/winrs/wmic/net/reg-style processes using explicit credentials.

Windows: Manual persistence attempt using schtasks to run Microsoft Compatibility Appraiser

Alerts when schtasks runs "Microsoft Compatibility Appraiser" via Application Experience, consistent with persistence abuse.

Windows service configuration tampering via sc/reg with payload execution paths

Looks for sc/reg command-line activity that updates Windows service ImagePath or FailureCommand to run attacker-controlled payloads.

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.

Windows VirtualBox Driver Registration or VM Startup via Process Command Line

Alerts on Windows processes whose command lines reference VirtualBox driver registration or VM start/control actions.

Windows NetLogon Secure Channel Connection Allowed for Vulnerable Client

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