Two MIT-educated brothers will face fraud charges over an alleged $25 million cryptocurrency heist from the Ethereum blockchain, after a judge rejected their attempt to have the case thrown out.
On Wednesday, U.S. District Judge Jessica Clarke denied the motion to dismiss filed by Anton and James Peraire-Bueno, ruling that the government’s allegations sufficiently met the legal definition of fraud.
Federal prosecutors charged the brothers in May 2024, accusing them of orchestrating a sophisticated scheme to exploit a vulnerability in the Ethereum network and steal $25 million in cryptocurrency from unsuspecting traders.
“Accepting the government’s allegations as true, as required at this stage, the wire fraud statute gave the defendants fair notice that their alleged actions were criminal—even if the method they used was unprecedented,” Judge Clarke stated.
According to prosecutors, the brothers carried out a groundbreaking exploit that took just 12 seconds, using their computer science expertise to manipulate MEV (Maximum Extractable Value) bots. They allegedly tricked the bots into executing certain trades and then interfered with the blockchain’s validation process to profit from the transactions.
MEV bot manipulation
MEV (maximal extractable value) bots are designed to front-run transactions in order to profit from higher fees for priority transactions.
According to the indictment, MEV bots monitor the Ethereum mempool for profitable arbitrage opportunities by taking advantage of price discrepancies or predictable price movements based on pending transactions visible in the mempool.
The filing also outlines how the brothers devised a sophisticated four-step strategy—“bait, block, search, and propagation”—to carry out the exploit. As part of the plan, they set up 16 Ethereum validators using 529.5 ETH and deployed “lure transactions” designed to attract MEV bots into making trades they could then manipulate.
The Brothers’ Counterarguments
The brothers contended that the wire fraud statute failed to give them fair notice that their actions were criminal, arguing that everything they did was “permitted by the system’s code.” According to their defense, operating within the rules of the Ethereum protocol should not be considered unlawful.
They also claimed selective prosecution, asserting that they were unfairly targeted while the trading bots they exploited were themselves engaged in manipulative practices.
In response to their arguments, prosecutors dropped one charge—conspiracy to receive stolen property—after the brothers cited a Department of Justice memo urging caution against regulatory overreach in cases involving digital assets.
Pre-Trial Motions Phase Ongoing
At an August 2024 hearing, Judge Jessica Clarke ordered that Anton and James Peraire-Bueno would stand trial in October 2025.
That timeline remains in place following the denial of their motion to dismiss, although the ruling did not formally reaffirm the trial date. The case continues to move through the pre-trial motions phase.
The brothers face serious charges, including wire fraud, conspiracy to commit wire fraud, and conspiracy to commit money laundering. If convicted, they could face substantial prison time and hefty fines, as these federal offenses typically carry severe penalties.
