<  Back to rules search

AWS CloudWatch rule disabled or deleted

cloudtrail

Classification:

attack

Tactic:

Technique:

Cette page n'est pas encore disponible en français, sa traduction est en cours.
Si vous avez des questions ou des retours sur notre projet de traduction actuel, n'hésitez pas à nous contacter.

Goal

Detect when a CloudWatch rule has been disabled or deleted.

Strategy

This rule lets you monitor CloudTrail and detect if a DisableRule or DeleteRule API call has occurred. An attacker may delete rules in an attempt to evade defenses.

Triage and response

  1. Determine if {{@userIdentity.arn}} should have made the {{@evt.name}} API call.
  2. If the API call was not made legitimately by the user:
  • Rotate user credentials.
  • Determine what other API calls were made by the user.
  • Enable or create a rule using the aws-cli commands enable-rule or put-rule, or reference the AWS documentation to revert the rules back to the last known good state.
  1. If the API call was made legitimately by the user:
  • Determine if the user was authorized to make that change.
  • If Yes, consider including the EventBus name in a suppression list: {{@requestParameters.eventBusName}}.
  • If No, enable or create a rule using the aws-cli commands enable-rule or put-rule, respectively, or reference the AWS documentation to revert the rules back to the last known good state.
    • Begin your company’s IR process and investigate.

Changelog

  • 4 October 2022 - Updated severity