A major multisignature wallet was stolen due to a private key leak, resulting in a loss of $23.7 million.

According to Huoxun Finance on December 18th, a whale's multi-signature wallet was stolen due to a private key leak, resulting in a loss of approximately $27.3 million. The hacker has laundered $12.6 million (equivalent to 4,100 ETH) through TornadoCash and holds approximately $2 million in liquid assets. Furthermore, the thieves also gained control of the victim's multi-signature wallet. This wallet held a leveraged long position on the Aave platform: depositing $25 million worth of ETH as collateral and borrowing 12.3 million DAI.