Ethereum Compromised Wallet & EIP-7702 Sweeper Rescue Handbook (2026 Reference)
When an Ethereum private key or seed phrase leaks, automated sweeper bots monitor the address and drain any incoming ETH within milliseconds—long before you can broadcast a standard transfer or revoke transaction. Since the May 2025 Pectra upgrade ( EIP-7702 , transaction type 0x04 ), attackers also attach persistent 0xef0100 || delegate_address bytecode directly to externally owned accounts…
When an Ethereum private key or seed phrase is compromised, malicious bots rapidly drain any incoming ETH, often before the victim can broadcast a standard transaction. As of the May 2025 Pectra upgrade, attackers now attach malicious 0xef0100 || delegate_address bytecode directly to externally owned accounts, executing malicious receive() hooks during the funding call.
This reference compiles a comprehensive atomic Flashbots bundle rescue architecture, EIP-7702 delegation clearing procedure, and protocol-specific recovery runbooks from the MEV DAO.
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