This detection rule identifies the deletion of AWS Network Access Control Lists (ACLs) using data from AWS CloudTrail logs. The specific API operation monitored is `DeleteNetworkAclEntry`, and the detection highlights successful deletion attempts of network ACL entries that may expose systems to unauthorized access. By tracking user activities that involve such critical changes, the rule aims to mitigate the risk of attackers circumventing existing network security measures. In case a deletion is found, analysts are alerted to investigate whether the action was legitimate or part of a malicious intent, as downloading or bypassing a network ACL can lead to data breaches or compromise of cloud instances.