sigmaDRL-1.1from SigmaHQ/sigma

Steganography Hide Zip Information in Picture File

Detects appending of zip file to image

Quality

100

FP risk

—

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ATT&CK techniques

T1027.003

Rule sourcerules/linux/auditd/execve/lnx_auditd_hidden_zip_files_steganography.yml

title: Steganography Hide Zip Information in Picture File
id: 45810b50-7edc-42ca-813b-bdac02fb946b
status: test
description: Detects appending of zip file to image
references:
    - https://zerotoroot.me/steganography-hiding-a-zip-in-a-jpeg-file/
author: 'Pawel Mazur'
date: 2021-09-09
modified: 2022-10-09
tags:
    - attack.defense-evasion
    - attack.t1027.003
logsource:
    product: linux
    service: auditd
detection:
    commands:
        type: EXECVE
        a0: cat
    a1:
        a1|endswith:
            - '.jpg'
            - '.png'
    a2:
        a2|endswith: '.zip'
    condition: commands and a1 and a2
falsepositives:
    - Unknown
level: low