Data Compressed — Sigma Rule

Rule metadata and linked tags

Author: Timur Zinniatullin, oscd.community. Source status: test; severity: low. Source dates: 2019-10-21 / 2023-07-28.

{
  "product": "linux",
  "service": "auditd"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 128191e589c1462d01c76513d90109cf069ee0cef82979c72ab562279ecef556

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Data Compressed
id: a3b5e3e9-1b49-4119-8b8e-0344a01f21ee
status: test
description: An adversary may compress data (e.g., sensitive documents) that is collected prior to exfiltration in order to make it portable and minimize the amount of data sent over the network.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/a78b9ed805ab9ea2e422e1aa7741e9407d82d7b1/atomics/T1560.001/T1560.001.md
author: Timur Zinniatullin, oscd.community
date: 2019-10-21
modified: 2023-07-28
tags:
    - attack.exfiltration
    - attack.collection
    - attack.t1560.001
logsource:
    product: linux
    service: auditd
detection:
    selection1:
        type: 'execve'
        a0: 'zip'
    selection2:
        type: 'execve'
        a0: 'gzip'
        a1: '-k'
    selection3:
        type: 'execve'
        a0: 'tar'
        a1|contains: '-c'
    condition: 1 of selection*
falsepositives:
    - Legitimate use of archiving tools by legitimate user.
level: low

Original YAML and metadata in JSON

False positives

• Legitimate use of archiving tools by legitimate user.

Source references

• https://github.com/redcanaryco/atomic-red-team/blob/a78b9ed805ab9ea2e422e1aa7741e9407d82d7b1/atomics/T1560.001/T1560.001.md