On December 23, Defrost Finance V2, the Avalanche ecological native stablecoin project, was attacked by a flash loan, and the hackers made a profit of $173,000. On December 25th, Defrost Finance V1 went wrong again, hackers managed to steal the owner’s key, the protocol was added with fake collateral tokens, and a malicious price oracle was used to liquidate current users, with losses estimated at more than $12 million. On December 27, the hackers who carried out the attack on Defrost Finance V1 have returned the stolen funds.