wiredmikey writes "Cybercrime's underground activity, much like a Middle Eastern bazaar, is a loud and boisterous market. Buying, selling, haggling and cheating all take place in these marketplaces. Each marketplace houses other specialized-markets of illegitimate goods. There's the credit cards market, the bot rental market, another one for viruses, and one more for the credentials – to name a few. The column discusses how cybercriminals communicate, how these markets operate and how hacker transactions are being performed."