In this report, we demonstrate a new type of attack we call “Man in the Cloud” (MITC). These MITC attacks rely on common file synchronization services (such as GoogleDrive and Dropbox) as their infrastructure for command and control (C&C), data exfiltration, and remote access. Without using any exploits, we show how simple re-configuration of these services can turn them into a devastating attack tool that is not easily detected by common security measures.
Since most organizations either allow their users to use file synchronization services, or even rely on these services as part of their business toolbox, we think that MITC attacks will become prevalent in the wild. As a result, we encourage enterprises to shift the focus of their security effort from preventing infections and endpoint protection to securing their business data and applications at the source.