Assistant U.S. Attorney General Mythili Raman said the scheme cost their victims hundreds of millions of dollars.

"The defendants charged today were allegedly responsible for spearheading a worldwide hacking conspiracy that victimized a wide array of consumers and entities, causing hundreds of millions of dollars in losses," Raman said.

Those charged in a superseding indictment released Thursday were Vladimir Drinkman, 32, of Syktyykar and Moscow, Russia, and Alexandr Kalinin, 26, of St. Petersburg, Russia. Prosecutors said they specialized in bypassing security and gaining access to computer systems.

Roman Kotov, 32, of Moscow, allegedly specialized in stealing data once the networks were breached. Mikhail Rytikov, 26, of Odessa, Ukraine, is charged with providing an anonymous Web-hosting service while Dmitriy Smilianets, 29, of Moscow, allegedly sold the information.

The hackers allegedly stole information on 160 million credit cards, which were sold for $10 to $50 each, the lower price for U.S. credit card information and the top price for European credit card information.

The companies lost a combined $300 million, prosecutors said.