After discovering a cache of 17 million emails exposed on an unsecured database, researchers with vpnMentor began to hunt for its owner — but to their surprise, they found that the database belonged not to a company, but to a sophisticated criminal network. Cybercriminals had been both collecting emails — and creating their own — as part of a major fraud scheme targeting Groupon, Ticketmaster and other major online vendors.

Read full article on Threat Post