The most recent version , CryptoWall 4.0 , enhanced its code to avoid antivirus detection .
The most recent version , CryptoWall 4.0 , encrypts not only the data in files but also the file names .
The most recent version , CryptoWall 4.0 , enhanced its code to avoid antivirus detection , and encrypts not only the data in files but also the file names .