Possible Steganography Unzip Hidden Information From Picture File (via auditd)

title: Possible Steganography Unzip Hidden Information From Picture File (via auditd)
id: 11395cea-5024-537d-9b60-140888ed1476
status: stable
description: This rule detects extracting of zip file from image file
references:
    - https://attack.mitre.org/techniques/T1027/003/
    - https://zerotoroot.me/steganography-hiding-a-zip-in-a-jpeg-file/
author: 'Huntrule Team'
date: 2026-05-05
tags:
    - attack.stealth
    - attack.t1027.003
logsource:
    product: linux
    service: auditd
detection:
    commands:
        type: EXECVE
        a0: unzip
    a1:
        a1|endswith:
            - '.jpg'
            - '.png'
    condition: commands and a1
falsepositives:
    - Unknown
level: low