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Odaily reports: According to Bitcoin News monitoring, on-chain analysis shows that attackers appear to have exploited the Ethereum EIP-7702 mechanism to obtain signature authorization, installing malicious code without directly accessing the private keys of Binance-associated wallets. The attackers then called a function named "sweep" to transfer ETH and dozens of tokens into wallets under their control; the same delegation permission was reportedly also used to transfer $780 million USDC out of another Binance hot wallet. The attackers' transaction relayer received funding through Tornado Cash, and nearly 195,460 ETH was subsequently transferred to a newly created wallet. How the attackers obtained the relevant authorization remains unclear. Binance stated that user funds are safe and that an investigation is currently underway.
SlowMist stated ZetaChain has been exploited. Preliminary analysis indicates the root cause of the vulnerability lies in the lack of access control and input validation in the call function of the GatewayZEVM contract. This allowed attackers to initiate malicious cross-chain calls and, via the relayer mechanism, execute arbitrary operations on the target chain to transfer funds.SlowMist noted that the attacker forged cross-chain events to trigger the relayer into executing malicious calls, thereby stealing funds. The relevant attack transactions have been disclosed.