cloudtrail-data-events: CloudTrail S3 Data Events Logging

id: cloudtrail-data-events
info:
  name: CloudTrail S3 Data Events Logging
  author: princechaddha
  severity: low
  description: |
    Ensure Amazon CloudTrail trails log S3 data events to monitor object-level operations like GetObject, DeleteObject, and PutObject.
  impact: |
    Without logging S3 data events, you lose visibility into object-level operations which could help detect unauthorized access or modifications.
  remediation: |
    Enable data event logging in CloudTrail for S3 buckets to ensure detailed activity monitoring and logging for better security and compliance.
  reference:
    - https://docs.aws.amazon.com/awscloudtrail/latest/userguide/logging-data-events-with-cloudtrail.html
  metadata:
    max-request: 2
  tags: cloud,devops,aws,amazon,s3,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 get-event-selectors --region $region --trail-name $trail --query 'EventSelectors[*].DataResources[]'

    matchers:
      - type: word
        words:
          - "[]"

    extractors:
      - type: dsl
        dsl:
          - '"CloudTrail trail" + trail + " is not configured to capture resource operations performed on or within an AWS cloud resource"'
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