Authorities say they have busted the “most powerful hacker group” in the country. Cyber Warrior Invasion had attacked more than 500 websites worldwide. The group used a complex system of “zombie” proxy servers to hide its location and hide its true location. Four laptops, five desktop computers, seven portable digital information devices, three hard discs and over 200 CDs were seized. On the confiscated computers, police discovered databases with large amounts of stolen emails, social network profiles and associated passwords, as well as stolen credit card data.
Source: https://thehackernews.com/2012/07/bulgarian-hackers-group-arrested.html