DropSmack: Using Dropbox Maliciously

I found an interesting article on TechRepublic, “DropSmack: Using Dropbox to steal files and deliver malware.

Given that 50 million people are using DropBox, it surely looks like an inviting attack vector for cyber adversaries. Jacob Williams (@MalwareJake) seems to have developed malware, DropSmack, to embed in a Word file already synchronized by DropBox to infect an internal endpoint and provide Command & Control communications.

What technical control do you have in place that would detect and block DropSmack? A network security product would have to be able to decode application files such as Word, Excel, PowerPoint, PDF, and then detect the malware and/or anomalies embedded in the document.

Can you prevent DropBox from being used in your organization? Should you? What about other file sharing applications?