The Morris Worm (1988) (2/10)

Morris was a student at the Cornell University in the USA. He is credited for creating the first computer worm that was successfully transmitted through the internet. According to him, the purpose of his worm was to explore the vastness of the world wide web.

This worm became the victim of a critical error and ended up damaging thousands of computers, causing a loss of up to 1$100 million.

MafiaBoy causing $1 billion in damages (2000) (1/10)

Google China hacked (2009) (3/10)