On one side are the creators of MyDoom and Bagle, who are believed to be spammers or spam groups because many variants of the viruses leave backdoors on infected computers that can be used to turn them into spam zombies, said Chris Belthoff, senior security analyst at anti-virus company Sophos Inc.
On the other side is the person or group responsible for the Netsky virus, who do not have any profit motive, he said.
“It almost seems like they are playing a war of one-upmanship,” Belthoff said. “They could be jealous over the media attention the others are getting.”
Read more at Reuters Technology.