According to ChainCatcher, according to Cyvers Alerts monitoring, Moonwell's USDC lending contract on the Optimism network was attacked by a flash loan. The attacker used the malicious contract address as mToken to obtain unauthorized token approval from Moonhackers, thereby stealing funds. The attacker obtained financial support through Tornado Cash on the Ethereum network. The stolen USDC has been exchanged for DAI and is currently stored in the attacker's wallet.