It’s been a few years since we have seen CryptoLocker on a regular basis, but now it seems to be making its rounds again via a new spam campaign. The new CryptoLocker variant has been around for many years, and has evolved over that time.

CryptoLocker used to be very popular back when the Zeus botnet was making its rounds. The way it worked was once a computer was infected with the Zeus malware, it would be used to push the CryptoLocker ransomware onto the machine.