Now a group of researchers at the Centre National de la Recherche Scientifique in France has made the startling discovery that even some viruses can have viruses.

Most malware attack vectors are designed to target a wide cross-section of potential victims, but every now and then something different pops up. In this case, there's a new bug spreading aimed specifically at corporate CEOs with a fear of the criminal justice system.

The image above isn't something from James Cameron's Aliens of the Deep. No, it's actually an artist's rendering of a spam e-mail with the subject, "HAVE YOU EVER HEARD THAT YOU ARE GETTING FAT?" The images below represent some of the most notorious code the world has seen, including PWS-Lineage, Stormy, MyDoom, Mytob, IRCBot and Netsky.