Poly Network, a decentralized finance (DeFi) platform based in China, publicly acknowledged that an attacker exploited a vulnerability that allowed them to assign themselves the ownership of money processed through the platform. Poly Network tweeted that it planned to take legal action and demanded that the attackers return the stolen funds. The company urged crypto-miners of affected blockchain and crypto exchanges to blacklist tokens coming from the above addresses Some of the loot stolen was also redirected to non-profits Binance Charity and Archive.org.
Source: https://threatpost.com/crypto-hack-600-million/168554/