U.S. prosecutors have charged a Maryland man with stealing more than $53 million after hacking the Uranium Finance crypto exchange twice and laundering the proceeds through a cryptocurrency mixer.

36-year-old Jonathan Spalletta (known online as “Cthulhon” and “Jspalletta”) appeared in court before U.S. Magistrate Judge Ona T. Wang after surrendering to law enforcement on Monday.

Spalletta hacked the decentralized cryptocurrency exchange Uranium (which operated as an automated market maker similar to Uniswap) in April 2021, forcing the company to shut down due to a lack of funds after stealing approximately $53.3 million worth of cryptocurrency.

“As alleged, Jonathan Spalletta repeatedly hacked smart contracts to steal…