Potential Linux Process Code Injection Via DD Utility — Sigma Rule

Rule metadata and linked tags

Author: Joseph Kamau. Source status: test; severity: medium. Source dates: 2023-12-01 / not supplied.

{
  "product": "linux",
  "category": "process_creation"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: b33a2caba571e7feeb84116a0e958d5ba9602cf800e3e9ea0375216f03feb3a8

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: Potential Linux Process Code Injection Via DD Utility
id: 4cad6c64-d6df-42d6-8dae-eb78defdc415
status: test
description: Detects the injection of code by overwriting the memory map of a Linux process using the "dd" Linux command.
references:
    - https://www.aon.com/cyber-solutions/aon_cyber_labs/linux-based-inter-process-code-injection-without-ptrace2/
    - https://github.com/AonCyberLabs/Cexigua/blob/34d338620afae4c6335ba8d8d499e1d7d3d5d7b5/overwrite.sh
author: Joseph Kamau
date: 2023-12-01
tags:
    - attack.privilege-escalation
    - attack.stealth
    - attack.t1055.009
logsource:
    product: linux
    category: process_creation
detection:
    selection:
        Image|endswith: '/dd'
        CommandLine|contains|all:
            - 'of='
            - '/proc/'
            - '/mem'
    condition: selection
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://www.aon.com/cyber-solutions/aon_cyber_labs/linux-based-inter-process-code-injection-without-ptrace2/
• https://github.com/AonCyberLabs/Cexigua/blob/34d338620afae4c6335ba8d8d499e1d7d3d5d7b5/overwrite.sh