The AWS Bedrock Invoke Model Access Denied detection rule is designed to identify access denials when a user or service attempts to invoke models in AWS Bedrock, utilizing AWS CloudTrail logs. It specifically detects entries where the `InvokeModel` API call results in an `AccessDenied` error. This type of failure can indicate potential attempts by adversaries to exploit compromised credentials or misconfigured permissions to access sensitive generative AI resources. Such actions may be indicative of reconnaissance efforts or privilege escalation, posing risks like data exfiltration or manipulation of AI model outputs. The detection leverages Splunk's capabilities to analyze CloudTrail logs, track error occurrences, and gather statistics around the user and source of the access denial events, requiring the AWS App for Splunk and the AWS Add-on for Splunk for full functionality.