The detection rule titled 'AWS RDS Security Group Creation' is designed to monitor and identify unauthorized creation events of Amazon Relational Database Service (RDS) security groups. These groups act as virtual firewalls, controlling access to RDS instances, making them critical for ensuring database security. Adversaries may exploit this by creating security groups to maintain unauthorized access or exfiltrate sensitive data. The rule leverages AWS CloudTrail logs to capture events related to the successful creation of RDS security groups, focusing on specific identifiers, including user accounts and event outcomes. Investigations following an alert may involve reviewing the responsible user or role, analyzing related access patterns, and ensuring compliance with organizational security policies. This rule has a low severity and a risk score of 21, allowing security teams to prioritize responses accordingly. Notably, it encompasses guidance on recognizing false positives, typically resulting from legitimate administrative actions, and provides a comprehensive approach to review, respond, and remediate any detected threats related to unauthorized RDS security group creation.