Two arrests. Twenty-eight servers seized. And 1,000 decryption keys obtained that can help hacking victims worldwide get their data back.

The takedown announced Feb 20 of the Russia-linked hacking gang LockBit, which by some estimates has been responsible for a quarter of all ransomware attacks, represents what law enforcement agencies in the UK, US and Europe described as one of the heaviest blows they’ve ever dealt against criminal hackers.