SigmaHQ/rules/linux/auditd/lnx_auditd_hidden_zip_files_steganography.yml
2021-09-10 07:52:35 +02:00

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YAML

title: Steganography Hide Zip Information in Picture File
id: 45810b50-7edc-42ca-813b-bdac02fb946b
description: Detects appending of zip file to image
author: 'Pawel Mazur'
status: experimental
date: 2021/09/09
references:
- https://attack.mitre.org/techniques/T1027/003/
- https://zerotoroot.me/steganography-hiding-a-zip-in-a-jpeg-file/
tags:
- attack.defense_evasion
- attack.t1027.003
falsepositives:
- None
level: low
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