It seems that a hacker adopted the flash loan and used 20 ETH to cash out over $4 million from Harvest. The total transfer fee was 5.19 ETH. The initial ETH source used by the hacker was the Ethereum anonymous transfer platform Tornado.cash. The hash is 0x35f8d2f572fceaac9288e5d462117850ef2694786992a8c3f6d02612277b0877. It can be seen from the Ethereum browser that the hacker transferred 20 WETH to the Harvest Finance contract (address: 0xc6028a9fa486f52efd2b95b949ac630d287ce0af), and finally transferred the 20 ETH back to his address. The hacker took many steps and successfully cashed out about $4.13 million U.S. through multiple contract transactions.