One implementation included a receive function that triggered automatic ETH transfers as soon as any funds arrived. The wallet user had no control once the contract was deployed.
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Ethereum’s EIP-7702 Feature From Pectra Upgrade Triggers Mass Wallet Theft
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Ethereum contracts deployed using the EIP-7702 feature introduced in the Pectra upgrade have been exploited to function as sweepers that automatically transfer incoming ETH from compromised wallets to addresses controlled by attackers.
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