nuclei-templates/cloud/aws/cloudtrail/cloudtrail-log-integrity.yaml

id: cloudtrail-log-integrity
info:
  name: CloudTrail Log Integrity Validation not Enabled
  author: princechaddha
  severity: high
  description: |
    Ensure CloudTrail log file integrity validation is enabled to detect unauthorized file modifications.
  impact: |
    Without log file integrity validation, it's harder to detect if CloudTrail logs have been tampered with, potentially hiding malicious activity.
  remediation: |
    Enable log file integrity validation on all CloudTrail trails to ensure the integrity and authenticity of your logs.
  reference:
    - https://docs.aws.amazon.com/awscloudtrail/latest/userguide/cloudtrail-log-file-validation-intro.html
  metadata:
    max-request: 2
  tags: cloud,devops,aws,amazon,cloudtrail,aws-cloud-config
variables:
  region: "ap-south-1"

flow: |
  code(1)
  for(let CloudTrail of iterate(template.cloudtrailname)){
    set("trail", CloudTrail)
    code(2)
  }

self-contained: true
code:
  - engine:
      - sh
      - bash
    source: |
      aws cloudtrail list-trails --region $region --query 'Trails[*].Name' --output json

    extractors:
      - type: json
        name: cloudtrailname
        internal: true
        json:
          - '.[]'

  - engine:
      - sh
      - bash
    source: |
         aws cloudtrail describe-trails --region $region --trail-name-list $trail --query 'trailList[*].LogFileValidationEnabled'

    matchers:
      - type: word
        words:
          - "false"

    extractors:
      - type: dsl
        dsl:
          - '"The log file integrity validation is not enabled for CloudTrail trail" + trail'
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