https://www.bleepingcomputer.com/news/security/germany-seizes-47-crypto-exchanges-used-by-ransomware-gangs/

German law enforcement seized 47 cryptocurrency exchange services hosted in the country that facilitated illegal money laundering activities for cybercriminals, including ransomware gangs.

The platforms allowed users to exchange cryptocurrencies without following applicable "Know Your Customer" regulations, meaning that users remained completely anonymous when making transactions.