This document discusses how Check Point's cloud-based Threat Emulation Service can prevent zero-day and targeted attacks. The service inspects files in email attachments and downloads by sending them to a virtual sandbox to emulate their behavior across multiple OS environments. Any abnormal activity is detected and used to immediately update security gateways to prevent the spread of unknown malware. Check Point's solution provides a complete threat prevention system without requiring new equipment and protects against both known and unknown threats.