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.

Ikee

"Many people hadn't even heard of 'jailbreaking' a mobile device until the Ikee threat showed up (in 2009)," says Symantec's Haley.

Affecting Apple's iPhone, the threat was rather harmless in payload, but it caught people's attention and demonstrated a couple of important facts: Mobile devices are simply computers and must be protected from cyber threats just like any other computer and like flies to honey, wherever you have a popular operating system, malware is sure to follow.

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