Detectionhightest

Reg Add Suspicious Paths

Detects when an adversary uses the reg.exe utility to add or modify new keys or subkeys

Convert In Phoenix Studio

Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.

François Hubaut, Nasreddine Bencherchali (Nextron Systems)Created Fri Aug 19Updated Mon Oct 10b7e2a8d4-74bb-4b78-adc9-3f92af2d4829windows

Log Source

WindowsProcess Creation

ProductWindows← raw: windows

CategoryProcess Creation← raw: process_creation

Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.

Detection Logic

detection:
    selection_reg:
        - Image|endswith: '\reg.exe'
        - OriginalFileName: 'reg.exe'
    selection_path:
        CommandLine|contains:
            # Add more suspicious registry locations below
            - '\AppDataLow\Software\Microsoft\'
            - '\Policies\Microsoft\Windows\OOBE'
            - '\Policies\Microsoft\Windows NT\CurrentVersion\Winlogon'
            - '\SOFTWARE\Microsoft\Windows NT\Currentversion\Winlogon'
            - '\CurrentControlSet\Control\SecurityProviders\WDigest'
            - '\Microsoft\Windows Defender\'
    condition: all of selection_*