In Pictures: 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.

Anna Kournikova virus

In 2001, the Anna Kournikova virus spread like wildfire via emails promising a picture of the tennis star.

This proved that just like in advertising, when it comes to social engineering, sex sells, says Haley.

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