2. Astra
Astra was a Greek hacker and mathematician who stole and sold millions of dollars worth of sensitive information. He hacked into the Dassault Group’s computers, stealing data on jet fighters and military aircraft, and sold it to various countries, causing $360 million in damages.
In January 2008, after a determined manhunt by Dassault, Astra was caught and sentenced to six years in prison. His real identity was never revealed to the public.