Bitcoin ransomware has been a new type of malware attacking computers and networks all over the world. By decrypting all important file extensions, and forcing the device owner to pay a ransom in bitcoin to decrypt the files, assailants have found a new way to abuse the popular digital currency for nefarious acts. Even though it looked like this threat was “under control” for a brief while, a new version of CryptoWall is making the rounds.
http://bitcoinist.net/bitcoin-ransomware-cryptowall-back-improvements/