Just as computing power rushes to the cloud and users' attention shifts from PCs to their mobile devices and social networks
-- so does the focus of the bad guys.
Consider the Bohu Trojan recently spotted in China by Microsoft
security researchers Jingli Li and Zhitao Zhou. This Trojan
blocks connections to cloud anti-virus applications from customers'
Windows systems, and has been active against common anti-virus
vendors in that country, according to a Microsoft blog post.