The CryptoWall ransomware is less virulent and lacks the sophistication for wringing more money from victims. The criminals behind CryptoWall have compromised 625,000 computers in the last six months, surpassing the roughly half million infected with CryptoLocker. The latter ransomware faded quickly in May after a multi-national law enforcement operation took down the 2-year-old Gameover Zeus botnet, which was also the exclusive distributor of the CryptoWall. Despite the lack of virulent technology, CryptoWall has a much smaller take, roughly $1.1 million versus about $3 million for CryptoWall.”]