https://www.tomshardware.com/news/hacker-steals-600-million-poly-network :
A decentralized finance (DeFi) company called Poly Network today announced that hackers were able to steal as much as $600 million worth of various cryptocurrencies managed on the Binance Smart Chain, Ethereum, and Polygon blockchains.

Hacker Returns $256M of $600 Million Cryptocurrency Haul (Updated)Tom's HardwareCrime pays... briefly