Sigma detection rules, expert-reviewed

Windows: Detect esentutl.exe Copying Sensitive Credential Files via VSS

Alerts on esentutl.exe VSS usage and command lines referencing SAM/SECURITY/SYSTEM or ntds.dit copy targets.

Windows Volume Shadow Copy Symlink Creation Using mklink

Flags Windows mklink commands that reference HarddiskVolumeShadowCopy to create symlinks.

Windows: Unsigned DLL/EXE Image Loaded Into lsass.exe

Alerts on image loads into lsass.exe where the loaded image is unsigned.

Windows Static Webshell Indicators via Suspicious File Extension Creation in Web Roots

Alerts on Windows creation of script-like files with webshell extensions in web root directories, excluding common benign temp and XAMPP paths.

Windows Network Share File Transfers Targeting Credential and Memory Dump Paths

Alerts on network share access to credential-related files using Windows Security Event 5145.

Windows Network Tool Use for Possible Packet Sniffing (tshark/windump)

Alerts on Windows executions of tshark or windump that indicate potential passive network traffic capture.

Windows Local Account Discovery via System Utilities Process Execution

Flags Windows processes that match utilities used to enumerate local user and account information.

Windows: Detect sc.exe Service Config binPath Changes to Suspicious Commands/Paths

Alerts when sc.exe updates a service binPath to point at suspicious commands or commonly abused directories.

Windows reg.exe Registry Query Reconnaissance (Process Creation)

Alerts on reg.exe process executions performing registry queries against high-value configuration and service keys.

Windows Rar.exe Files Added to Archive Activity

Alerts when Windows rar.exe is used to add files to an archive using the " a " command-line pattern.

Windows: net.exe used to start a service with the start flag

Identifies Windows processes using net.exe/net1.exe with ' start ' to start services.

Windows Msxsl.exe Execution

Flags execution of the Windows MSXSL utility (msxsl.exe), which can be abused to process attacker-controlled XSL inputs.

Windows Process: File Association Changes via assoc Command

Alerts on cmd.exe launches running the assoc command to modify Windows default file associations.

PowerShell ScriptBlock Winlogon Registry Modification via CurrentVersion\Winlogon

Detects PowerShell script blocks that modify Winlogon helper registry keys via Set-ItemProperty or New-Item on Windows.

Windows Process Creation: Suspicious CHCP Code Page Switch to Rare Locale

Alerts on suspicious chcp.com usage that switches Windows code pages to specific rare identifiers in process creation logs.