The media has recently reported incidents involving the spread of the W32.SillyFDC worm, a low-risk piece of malware that sometimes infects PCs and networks via USB flash drives. It seems that this worm is so bad that the U.S. Department of Defense has banned USB drives and other removable media devices after a worm infiltrated Army networks!!
More on this here - http://www.scmagazineus.com/Militarys-b ... le/121326/
If you have a network that you admin you might want to watch out for this one.
More details on the worm can be found here - https://forums.symantec.com/syment/blog ... uid=366902