Yes, AWS GuardDuty can trigger AWS Lambda functions directly. This integration allows you to automate responses to specific security findings detected by GuardDuty. Here's how it works and its benefits, limitations, features, and use cases.

How It Works

• Finding Detection: GuardDuty detects a security finding.
• Event Creation: The finding generates an event in Amazon EventBridge (formerly CloudWatch Events).
• Lambda Trigger: EventBridge matches the event to a predefined rule, which triggers the associated Lambda function.
• Automated Response: The Lambda function executes predefined actions, such as isolating compromised instances, notifying administrators, or logging details for further analysis.

Benefits

• Automated Response: Automatically responds to security threats without manual intervention.
• Scalability: Scales to handle multiple findings and responses concurrently.
• Flexibility: Customizable Lambda functions to suit specific response needs.
• Integration: Seamlessly integrates with other AWS services and third-party tools.

Limitations

• Complexity: Requires setup and maintenance of EventBridge rules and Lambda functions.
• Latency: There might be slight delays between detection and response.
• Cost: Additional costs for Lambda executions and EventBridge events.

Features

• Real-Time Detection: GuardDuty continuously monitors for security threats.
• Event-Driven: Uses EventBridge to trigger Lambda functions based on GuardDuty findings.
• Custom Actions: Lambda functions can be customized to perform various actions, such as notifying administrators, quarantining instances, or updating security groups.
• Logging and Monitoring: Detailed logs and metrics for tracking automated responses.