Wu said that according to Cyvers Alerts, the multi-signature wallet of Parity, the parent company of Polkadot, was stolen 150,000 ETH (worth about $30 million at the time) due to a security vulnerability in 2017. The hacker used multiple merged addresses today to launder 3,050 ETH through eXch, worth $9 million. In addition, the hacker still controls 83,017 ETH on the main address, which is now worth $246.6 million.