the one that encrypts all your files? i’m running Avast free, and this has got me a little worried, as it encrypts all your files and any drives connected to the computer, only decrypts if you send money.
Youtube video on it
http://www.youtube.com/watch?v=Uzl_h-Nc8Ps&feature=player_embedded#t=1
It is beeing detected as Win32:Malware-gen.
By the way i also saw that video from Matt Rizos. 
It is beeing detected as Win32:Malware-gen.Depends what Version.....
Symantec Trojan.Ransomcrypt.E = avast Win32:Infected-B [Trj]
https://www.virustotal.com/en/file/80fbf5880082ca76542f3e5cc5ea83ac20b54e5a3d03389e4f759f3759cfea77/analysis/
Symantec Trojan.Ransomcrypt.B = avast Win32:Malware-gen
https://www.virustotal.com/en/file/a4b61fb69d373628c3fdbaf5718f2da4b4953424d9edd1c13b6831d3eea82417/analysis/
and more if you search…
anyway, leave the worry to avast, this is what they work on 24/7 … when you read it in the News you can be sure they have known about it for some time