AlphaBay Market was, by far, the largest and most prolific provider of cybercrime and fraud-related services in the world, prior to its seizure and arrest of its administrator Alpha02 by the FBI on July 4, 2017. While the Tor-based marketplace was most famous for the sale of narcotics, firearms and stolen goods, the AlphaBay's forum was also the epicenter of the English-speaking cybercriminal community. This community used AlphaBay as a platform to target governments and businesses all over the world, including Japan's financial services sector. During AlphaBay's tenure as the leading criminal marketplace, it provided a hugely rich source of intelligence on the tactics, techniques and operations of cybercriminal groups targeting a wide range of business verticals, then selling exfiltrated data through the marketplace securely and anonymously. While the marketplace is now offline, these groups remain and are using the same attack techniques. This talk reveals iDefense's research into AlphaBay, including its history and unique qualities that helped the marketplace achieve such a dominant position within the underground economy. Our findings include evidence of a uniquely sophisticated financial model, including cryptocurrency manipulation at a large scale, AlphaBay's deep ties with the Russian cybercriminal community and as a staging point for cyber criminals to build groups of expertise once they had identified an opportunity for profit. This talk will also reflect on the future for criminal marketplaces following the seizure of AlphaBay and what features we are likely to see in the next market to rise to the top.