Detectionlowtest

Compressed File Extraction Via Tar.EXE

Detects execution of "tar.exe" in order to extract compressed file. Adversaries may abuse various utilities in order to decompress data to avoid detection.

Convert In Phoenix Studio

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

Launch

AdmU3Created Tue Dec 19bf361876-6620-407a-812f-bfe11e51e924windows

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_extract:
        CommandLine|contains: '-x'
    condition: all of selection_*