The detection rule titled 'Abnormally High Number Of Cloud Security Group API Calls' is designed to identify unusual spikes in the volume of API calls made to cloud security groups within an AWS environment. This analytic utilizes data from the Change data model, specifically focusing on successful modifications associated with firewall configurations. The rule monitors API call activity to detect potential malicious behavior, such as unauthorized access attempts or unintended configuration changes that could jeopardize sensitive resources or overall network security. By analyzing patterns in API calls over time, the rule leverages statistical thresholds to ascertain whether the activity deviates from established baselines, indicating possible threats. In implementations, it is crucial to ingest cloud infrastructure logs and generate a baseline search to accurately define the probability density function model necessary for identifying these anomalies effectively.