Bitmart exchange hacked
"The latest centralized exchange hack may be among the most devastating to date as Bitmart has lost $196 million in various cryptocurrencies.

A tweet from security analysis firm Peckshield first called attention to the alleged hack Saturday night. One of Bitmart’s addresses currently shows steady outflows of entire token balances, some worth tens of millions of dollars, to an address currently labeled by Etherscan as the “Bitmart Hacker”"

Source: https://www.coindesk.com/business/2021/12/05/crypto-exchange-bitmart-hacked-with-losses-estimated-at-196-million/