Prevention is better than cure
Cryptowall 3, the latest incarnation of the Crowti family (Cryptolocker etc) of blackmail based malware, appears to be rampant at the moment. Its delivery method varies a little, but mostly it arrives in your inbox as a zip attachement, claiming to be an invoice or a CV. As we have seen, people seem to be very poor at recognising malevolent emails, so the criminals responsible for this little nasty are doing very well indeed.
If you open the attachment, nothing appears to happen, so the victim closes the email and continues with their day. Unfortunately, in the background, much is going on. The details can be found here, but in summary, a small amount of code contacts a Command & Control server and begins to assemble the malware on your PC. After it’s complete, it then looks for all drives on your system – including mapped network drives – and starts encrypting all your files. (more…)