A security engineer needs to build a solution to turn IAM CloudTrail back on in...

Use IAM Config with a managed rule to trigger the IAM-EnableCloudTrail remediation.

Create an Amazon EventBridge (Amazon CloudWatch Events) event with a cloudtrail.amazonIAM.com event source and a StartLogging event name to trigger an IAM Lambda function to call the StartLogging API.

Create an Amazon CloudWatch alarm with a cloudtrail.amazonIAM.com event source and a StopLogging event name to trigger an IAM Lambda function to call the StartLogging API.

Monitor IAM Trusted Advisor to ensure CloudTrail logging is enabled.