This detection rule identifies instances when AWS ElastiCache security groups are modified or deleted, which could indicate potential malicious activity aimed at bypassing security controls. Security groups play a critical role in governing the access permissions to ElastiCache resources, and unauthorized changes could facilitate unauthorized access or data breaches. The rule utilizes specific queries targeting AWS CloudTrail logs to monitor API actions that signify changes in security group configurations. The significance is amplified given that adversaries might exploit such vulnerabilities to execute defense evasion strategies, enhancing their unauthorized data access capabilities. Investigative steps are provided for determining the legitimacy of any detected events, enabling security teams to respond effectively to potential threats.