Angelo Martino is accused of playing both sides — committing attacks and conducting ransomware negotiations on some of the same cases on behalf of his former employer.

The comments from White House and ODNI officials ahead of a Counter Ransomware Initiative summit come as the gangs prove difficult to keep down.

ALPHV/BlackCat reportedly received $22 million from Change Healthcare before scamming its affiliates ahead of a possible rebrand.

Ransomware strains such as Maze, Ryuk and BlackCat have increasingly been part of FIN7's playbook in recent years, Mandiant says.

European officials do not currently believe that some of the attacks are linked.

Several key factors make the ransomware one of the fastest-growing variants, researchers say.