host.os.type: "linux" and event.category: "process" and process.name: "aws" and process.args: "--endpoint-url"
Install detection rules in Elastic Security
Detect AWS CLI Command with Custom Endpoint URL in the Elastic Security detection engine by installing this rule into your Elastic Stack.
To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(opens in a new tab or window).