There is a bad ransom virus being exploited in the Balkans--Coratia, Serbia, etc. If you need protection, below is a signature for 2 versions of it. Copy the information as is below, paste it in a Notepad file, name it Sigfile.mdb and put it in the ClamWin C:\ProgramData\.clamwin\db folder.

26624:eb037fa4261912cdec558443a7b2fb7d:Win.Trojan.Ransom-121217.1317
219648:9bfaf478b2adee10652c8d8f8b2f88ad:Win.Trojan.Ransom-121217.1315

Regards,