Dragonfly Managing Partner: The Arbitrum Security Committee injected emergency permissions to transfer attacker funds using ArbitrumUnsignedTxType

Golden Finance reports that on April 21, Dragonfly Managing Partner Haseeb Qureshi issued an analysis regarding “The Arbitrum Security Council transferred 30,765 ETH held by the Kelp DAO attacker to a secure address and froze it through a technical solution.” The transaction type is identified as ArbitrumUnsignedTxType (EIP-2718 type 0x65/101), which is a system-level transaction that cannot be signed by a regular EOA and can only be injected by the Arbitrum Security Council via ArbOS. This operation did not involve chain rollback or history rewriting; functionally, it is a state-level recovery: the attacker’s private key can still sign transactions, but the ETH at that address is transferred by the chain itself. This operation also demonstrates the authority of the Security Council as described in Arbitrum’s progressive decentralization documentation under “catastrophic emergency” situations.