For our 3rd Annual Underground Hacker Markets Report, Dell SecureWorks engaged two of our top intelligence analysts from our CISO INTEL Team. The team members spend time tracking hackers on the numerous underground hacker forums and marketplaces all over the world. While much of the cybercrime hitting organizations throughout the world is the result of cooperation by hackers working outside the confines of publicly-accessible marketplaces, these underground forums provide a small window into the world cybercriminals occupy. In this report, we concentrated on marketplaces located on the Russian Underground and on English-speaking marketplaces between Q3 2015 and Q1 2016.