Detection rules › Sigma
Potential Exploitation of CVE-2024-3094 - Suspicious SSH Child Process
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.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | No specific technique |
Event coverage
| Provider | Event |
|---|---|
| Sysmon-for-Linux | Event ID 1 |
Rule body yaml
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
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
ParentImage|endswith: '/sshd'
CommandLine|startswith:
- 'bash -c'
- 'sh -c'
User: 'root'
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
CommandLine | starts_with |
|
ParentImage | ends_with |
|
User | eq |
|