This story makes absolutely no sense at all. The errors present by these hackers are so comical it's simply unbelievable. I'm supposed to believe some elite Russian hacking group keeps their crypto wallets running on a US host where the FBI just logs right in and snatches the private key? I'm starting to entertain the conspiracies that the future of commodities price manipulation is fake ransomware attacks. There nee…
No, they’re not elite, they’re just script kiddies with a payout mechanism.
EDIT: as "koheripbal" says below, maybe their tumbler is a boob (paraphrased).