Potential Exploitation of CVE-2024-3094 - Suspicious SSH Child Process

Description

Detects potentially suspicious child process of SSH process (sshd) with a specific execution user. This could be a sign of potential exploitation of CVE-2024-3094.

Query · sigma

selection:
  ParentImage|endswith: /sshd
  CommandLine|startswith:
  - bash -c
  - sh -c
  User: root
condition: selection

Known false positives

  • Administrative activity directly with root authentication might trigger this rule if it's unnecessarily prefixed with "sh -c" or "bash -c"
Raw source Potential Exploitation of CVE-2024-3094 - Suspicious SSH Child Process · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Potential Exploitation of CVE-2024-3094 - Suspicious SSH Child Process
id: 9aa27839-e8ba-4d7a-ac1a-746c22c3d1e5
status: test
description: |
    Detects potentially suspicious child process of SSH process (sshd) with a specific execution user. This could be a sign of potential exploitation of CVE-2024-3094.
references:
    - https://github.com/amlweems/xzbot?tab=readme-ov-file#backdoor-demo
author: Arnim Rupp, Nasreddine Bencherchali, Thomas Patzke
date: 2024-04-01
modified: 2024-07-03
tags:
    - attack.execution
    - cve.2024-3094
    - detection.emerging-threats
logsource:
    category: process_creation
    product: linux
detection:
    selection:
        ParentImage|endswith: '/sshd'
        CommandLine|startswith:
            - 'bash -c'
            - 'sh -c'
        User: 'root'
    condition: selection
falsepositives:
    - Administrative activity directly with root authentication might trigger this rule if it's unnecessarily prefixed with "sh -c" or "bash -c"
level: high

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