Amazon GuardDuty upgraded the AWS CloudTrail Analysis which will further reduce the cost to the customers

Amazon GuardDuty has now improved the AWS CloudTrail Log analysis, so by doing this, the cost will be reduced to the customers. Cost reductions will differ by a customer that is based on the volume of the AWS CloudTrail logs. This means that the customers with high volumes of global Cloud Trail events will have the greatest net positive impact. AWS CloudTrial records an inclusive log of changes that take place in the AWS Accounts. Amazon GuardDuty analyzes the data anomaly detection and machine learning to identify unauthorized and unusual activity like unauthorized access to the accounts, cryptocurrency mining and unusual infrastructure deployments. Amazon GuardDuty will then notify you possible malicious activity affecting the security of the AWS resources.