The crew responsible for operating the Gameover variant of the infamous Zeus banking trojan is soliciting the enormous Cutwail botnet s spamming capacity to fire off millions of malicious emails that seemingly originate from a number of recognizable U.S. banks. The fraudulent emails inform their recipients that they have received a new encrypted message or a secure message from whichever bank the email purports to come from. The emails claim that the bank is concerned about user privacy and has devised some secure email exchange system.
Source: https://threatpost.com/gameover-zeus-variant-sends-malicious-email-cutwail-botnet-120512/77284/