Symantec's technical description and removal tool:
There's a new Trojan propagating across the web that encrypts files and changes their extension to .vicrypt. Rather than popup enticements to "offer decryption services" (ransom-ware) to the victim, they are relying on end-users searching for that file extension, in the hopes of landing on the malware authors website, where a tool is being sold.
Now you can get a free removal and decryption tool from Symantec, see link above.
This virus is not yet wide-spread, and hopefully won't become so. But if you see that file extension on your system, you should review the details and get cleaned up.