w32.USBWorm .
This virus is very dangerous and hard to remove.
My friend got infected with this virus and followed the steps in http://www.jeba.in/posts/w32usbworm-lets-remove-this-worm-manually/
Make sure that CAVS3 detects this virus.
I have no samples of the virus…
Well no antivirus is able to detect 100% of all viruses.
However with Comodo Firewall 3, you should easily be able to prevent such an infection 
CAVS 3 will be much stronger & likely to detect it.
However, as Justin pointed out, CFP 3 will PREVENT it.
Josh