According to PeckShield, after 20 million Optimism (OP) tokens minted for Wintermute Trading were hacked, hackers sent 1 million of these tokens to Ethereum co-founder Vitalik Buterin's wallet.
Data from Etherscan shows that the transfer took place at 03:26 CEST and hackers transferred approximately $874,000 worth of tokens to Vitalik Buterin's wallet. It is unclear why the hackers, who previously sold the bulk of the stolen tokens, sent the tokens to Buterin's wallet. Experts argue that transfer tokens may have been removed from decentralized exchanges, as there is little liquidity left for the token and there is not much trading at the moment.
The hackers also transferred voting rights for 1 million tokens to Ethereum Foundation security researcher Yoav Weiss. Buterin had previously transferred 1,746 OP tokens from Optimism AirDrop to Weiss. Weiss tweeted that the hacker was not himself, but suggested that the person could be a white-hat hacker.
The attack turned out to be due to a mistake made by Wintermute. The cryptocurrency market maker received a grant of 20 million OP tokens from Optimism and provided this grant to a multi-signature Ethereum address that had not yet been established on the Optimism network.
This bug allowed Hackers to request the undeployed address in Optimism, thereby withdrawing all funds. Wintermute said that it bought back 1 million tokens that were immediately sold by hackers after the hack.
Wintermute demanded that the hacker return the stolen OP tokens while offering an advisory role for the assets for which he was responsible. The hackers have one week to respond to Wintermute's request, but they have 18 million OPs left in their wallets, out of the 20 million they stole.
On the other hand, altcoin Optimism (OP) lost 30% of its value after the hack and fell rapidly from $ 0.90 to $ 0.70. The altcoin, which recovered somewhat after this decline, is trading at $ 0.8175 at the time of writing.