Amazon GuardDuty now offers Malware Protection for S3, a new feature that helps organizations safeguard their data in the cloud. This fully managed service scans S3 buckets to detect malware from untrusted sources, applying tags to infected objects and enabling automated quarantine. The video provides an overview of the feature's capabilities, pricing details, and a step-by-step demonstration of how to enable and use GuardDuty Malware Protection for S3. It highlights the service's seamless integration with existing S3 buckets, scalability, and the reduced operational overhead for security teams.