Arkham posted on the X platform that Avi Eisenberg, the attacker who profited approximately $110 million in 2022 by manipulating the Mango Markets price oracle, has recently had his on-chain address signing transactions again, drawing widespread attention from the community. Avi Eisenberg previously exploited vulnerabilities in Mango Finance to execute "high-profit trades," subsequently threatening to attack Aave, and was also arrested and imprisoned after attempting to liquidate others' positions on Curve, which resulted in his own liquidation. Now that his address has reappeared on-chain activity, the market is speculating whether he has returned to the crypto market, although no further details have been disclosed yet.