1. A cloud-based method, comprising: receiving known malware signatures at one or more nodes in a cloud-based system; monitoring one or more users inline through the one or more nodes in the cloud-based system for regular traffic processing comprising malware detection and preclusion; determining unknown content from a user of the one or more users is suspicious of being malware; sending the unknown content to a behavioral analysis system for an offline analysis; and receiving updated known malware signatures based on the offline analysis.