Prosecutors say Andrii Kolpakov posed as a legitimate, high-level penetration tester as part of the FIN7 group's crime spree, which included the theft of 15 million payment card numbers.

Researchers say they have new evidence the billion-dollar crime ring is still active.

An infamous hacking group is back to aggressively targeting banks less than a month after the Justice Department announced the arrest of three of its high-level members, according to new research.

The FBI's legal attaché program was crucial to bringing down the alleged FIN7 leaders.

Three Ukrainians accused of hacking vast quantities of financial data from U.S. businesses have been indicted, the Department of Justice announced Wednesday.