Potential RCE Exploitation Attempt In NodeJS — Sigma Rule

Rule metadata and linked tags

Author: Moti Harmats. Source status: test; severity: high. Source dates: 2023-02-11 / not supplied.

{
  "category": "application",
  "product": "nodejs",
  "definition": "Requirements: application error logs must be collected (with LOG_LEVEL=ERROR and above)"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 09d125f6f6faf300235fca870e326ff882a4ff924150e90460abbbdf3c091281

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 RCE Exploitation Attempt In NodeJS
id: 97661d9d-2beb-4630-b423-68985291a8af
status: test
description: Detects process execution related errors in NodeJS. If the exceptions are caused due to user input then they may suggest an RCE vulnerability.
references:
    - https://www.wix.engineering/post/threat-and-vulnerability-hunting-with-application-server-error-logs
author: Moti Harmats
date: 2023-02-11
tags:
    - attack.initial-access
    - attack.t1190
logsource:
    category: application
    product: nodejs
    definition: 'Requirements: application error logs must be collected (with LOG_LEVEL=ERROR and above)'
detection:
    keywords:
        - 'node:child_process'
    condition: keywords
falsepositives:
    - Puppeteer invocation exceptions often contain child_process related errors, that doesn't necessarily mean that the app is vulnerable.
level: high

Original YAML and metadata in JSON

False positives

• Puppeteer invocation exceptions often contain child_process related errors, that doesn't necessarily mean that the app is vulnerable.

Source references

• https://www.wix.engineering/post/threat-and-vulnerability-hunting-with-application-server-error-logs