edit 2 - or, they intentionally lied in the affidavit about having the private key, and used the warrant to force a certain exchange to make the transfer. I'm not even sure if there's a point in doing this - maybe they wanted us to believe they cracked the encryption?
All this cyber attack story is fake coordinated shit and I don't trust anything I hear from government sources and mainstream media anymore.
This must be some very stupid russian hackers or very stupid federal agents, and both of them don't know how to use tor, vpn and non-custodial wallets.
Someone may wonder why would they do something like this, how about more regulations, reducing privacy and total control of everything we are doing online and offline.
Don't trust this and any other future ''Cyber Attacks'' you hear on news, and investigate for yourself.