Detectionmediumtest

Use NTFS Short Name in Command Line

Detect use of the Windows 8.3 short name. Which could be used as a method to avoid command-line detection

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 05Updated Wed Sep 21dd6b39d9-d9be-4a3b-8fe0-fe3c6a5c1795windows

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:
        CommandLine|contains:
            - '~1.exe'
            - '~1.bat'
            - '~1.msi'
            - '~1.vbe'
            - '~1.vbs'
            - '~1.dll'
            - '~1.ps1'
            - '~1.js'
            - '~1.hta'
            - '~2.exe'
            - '~2.bat'
            - '~2.msi'
            - '~2.vbe'
            - '~2.vbs'
            - '~2.dll'
            - '~2.ps1'
            - '~2.js'
            - '~2.hta'
    filter:
        - ParentImage|endswith:
              - '\WebEx\WebexHost.exe'
              - '\thor\thor64.exe'
        - CommandLine|contains: 'C:\xampp\vcredist\VCREDI~1.EXE'
    condition: selection and not filter