https://www.bleepingcomputer.com/news/security/ransomware-bitcoin-wallet-frozen-by-uk-court-to-recover-ransom/

A victim's insurance company convinced the UK courts to freeze a bitcoin wallet containing over $800K worth of a ransomware payment.

In October 2019, a Canadian insurance company was hacked by the Bitpaymer Ransomware operators who encrypted 1,000 computers and 20 servers. To receive a decryptor, the operators demanded $1.2 million as a ransom payment.