New Network Route Added — Sigma Rule

Rule metadata and linked tags

Author: jamesc-grafana. Source status: test; severity: medium. Source dates: 2024-07-11 / not supplied.

{
  "product": "aws",
  "service": "cloudtrail"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: ead44eb0d604bf80db74a28468da5241a803ab248299016c79a70544ec81a41c

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: New Network Route Added
id: c803b2ce-c4a2-4836-beae-b112010390b1
status: test
description: |
    Detects the addition of a new network route to a route table in AWS.
references:
    - https://www.gorillastack.com/blog/real-time-events/important-aws-cloudtrail-security-events-tracking/
author: jamesc-grafana
date: 2024-07-11
tags:
    - attack.defense-impairment
    - attack.t1686.001
logsource:
    product: aws
    service: cloudtrail
detection:
    selection:
        eventSource: 'ec2.amazonaws.com'
        eventName: 'CreateRoute'
    condition: selection
falsepositives:
    - New VPC Creation requiring setup of a new route table
    - New subnets added requiring routing setup
level: medium

Original YAML and metadata in JSON

False positives

• New VPC Creation requiring setup of a new route table
• New subnets added requiring routing setup

Source references

• https://www.gorillastack.com/blog/real-time-events/important-aws-cloudtrail-security-events-tracking/