Sigma rule: Steganography Hide Zip Information in Picture File

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-c58867396d38, updated 2022-10-09T00:00:00.000Z.

Rule

Title
Steganography Hide Zip Information in Picture File
Status
test
Level
low
Author
Pawel Mazur
Date
2021-09-09
Modified
2022-10-09
File
rules/linux/auditd/execve/lnx_auditd_hidden_zip_files_steganography.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects appending of zip file to image

Log source

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

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.stealth
  • attack.t1027.003

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/linux/auditd/execve/lnx_auditd_hidden_zip_files_steganography.yml

Sources and licences

  • SigmaHQ

    "Steganography Hide Zip Information in Picture File" by Pawel Mazur (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/linux/auditd/execve/lnx_auditd_hidden_zip_files_steganography.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Steganography Hide Zip Information in Picture File",
entity page, dataset version ref-c58867396d38, updated 2022-10-09T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/45810b50-7edc-42ca-813b-bdac02fb946b (accessed 2026-11-03).
Underlying source: SigmaHQ rule 45810b50-7edc-42ca-813b-bdac02fb946b, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.