The Multichain MPC bridge platform is under suspicion of a potential multimillion-dollar exploit due to unusually large outflows. On July 6, it was observed that around $102 million in crypto was withdrawn from Multichain's Fantom bridge on the Ethereum side, along with $666,000 from Dogechain and $5 million from Moonriver. This led to speculations of a possible hack. The withdrawals included 7,214 Wrapped Ether (WETH) tokens worth $13.6 million, 1,024 Wrapped Bitcoin (WBTC) worth $31 million, and $58 million worth of USD Coin from the Fantom bridge's Ethereum smart contract.
Moreover, the Dogechain bridge's Ethereum contract saw a withdrawal of $666,000, which accounted for more than 86% of its total deposits, leaving only around $100,000 worth of assets in the bridge. From the Multichain Moonriver bridge contracts on Ethereum, a total of $5,872,661 worth of USDC and Tether were withdrawn, leaving only around $700,000 remaining on it.
Blockchain security firm PeckShield drew attention to the Fantom bridge transactions, suggesting the Multichain team should investigate. However, it is not confirmed whether the contracts were "drained" or if a large amount of funds were simply withdrawn by users.
Multichain, a multi-party computation (MPC) bridging network, has been experiencing technical issues over the past few weeks. On May 31, the team announced that its CEO had gone missing and it was facing "multiple issues due to unforeseeable circumstances," leading to delayed transactions. On July 5, Binance halted withdrawals of some Multichain derivative tokens due to the network's inability to process transactions promptly.
The Multichain team has acknowledged the abnormal movements and is currently investigating the situation.
