CryptoWall Ransomware Being Spread via Yahoo ads

Crooks are using Yahoo!’s advertising network to infect PCs with the CryptoWall ransomware, it’s claimed.

Windows software nasty CryptoWall encrypts a victim’s files using an OpenSSL-generated key pair before demanding a ransom to decrypt the data. It communicates with its masters using RC4-encrypted messages to command servers hidden in the Tor …