According to CoinMeta, Wu said that after conducting static analysis, dynamic analysis, and actual transaction observation on 84,163 Uniswap V4 hooks across 6 chains, it was found that only 19.4% were deemed secure, 54.2% were identified as malicious, and another 26.4% were suspected of being malicious. 0x stated that there has been a recent significant increase in malicious hooks, with some providing attractive quotes during the aggregator's inquiry stage but changing pricing or charging high fees at the time of actual settlement. It was observed that in some transactions, the actual assets received were up to 50% less than the quoted amounts.