The AWS Lambda CRUD Actions detection rule is designed to identify unauthorized Create, Read, Update, or Delete (CRUD) operations on AWS Lambda functions. This is particularly significant as Lambda allows for automation and programmatic control over resources. Unauthorized access can lead to malicious activity such as data breaches, unauthorized data manipulation, or service disruption. The rule utilizes AWS CloudTrail logs to monitor API calls related to Lambda functions, specifically focusing on actions that may be performed by unauthorized users or accounts. It is critical for organizations to ensure that only authorized identities have the necessary permissions to manage Lambda functions. The severity of the rule is categorized as high due to the potential impact on security and operational integrity. When an unauthorized CRUD event is detected, appropriate incident response measures should be taken. The detection logic involves validating against known unauthorized accounts and users and verifying function call legitimacy via AWS API logs. This enhances the overall security posture in the context of AWS Lambda usage.