Detectionlowtest

Compressed File Creation Via Tar.EXE

Detects execution of "tar.exe" in order to create a compressed file. Adversaries may abuse various utilities to compress or encrypt data before exfiltration.

Convert In Phoenix Studio

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

Launch

Nasreddine Bencherchali (Nextron Systems), AdmU3Created Tue Dec 19418a3163-3247-4b7b-9933-dcfcb7c52ea9windows

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_img:
        - Image|endswith: '\tar.exe'
        - OriginalFileName: 'bsdtar'
    selection_create:
        CommandLine|contains:
            - '-c'
            - '-r'
            - '-u'
    condition: all of selection_*