20 notorious worms, viruses and botnets

The earliest worms and viruses were created for geeky fun and did little harm - oh, how times have changed. Here are 20 worms, viruses and botnets that show the evolution of malware, from Creeper to Flame.

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Zeus botnet


Credit: Webb Zahn / Flickr

Chris Larsen, Malware Lab Architect for Blue Coat Systems, points to Zeus, first discovered in 2007, as the "king of the botnet kits."

A malware platform unto itself that can be used to create a Trojan horse that steals banking information with man-in-the-browser keystroke logging and form grabbing, Zeus is spread mainly through drive-by downloads and phishing schemes.

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