Cryptowall malware

The Mimecast email filtering system will protect against Cryptowall, cryptolocker and other variants of the recent set of malware that encrypts data. It can also protect against one of the other methods of infection with these types of attack using the new Targeted Threat Protection add-on. This re-writes links in emails to be redirected through Mimecast. If the email links to a site that later becomes infected, or is redirected to somewhere else that downloads the payload, Mimecast would detect that as the link is clicked and stop the user going to the infected site.