The old ransomware business model is no longer enough for malware authors. New additions have made Reveton into something even more powerful.
http://blog.avast.com/2014/08/19/reveton-ransomware-has-dangerously-evolved/
more here............
http://blog.avast.com/2014/08/19/reveton-ransomware-has-dangerously-evolved/
more here............