The Harmony team says it will offer $1 million to the hacker who exploited the Horizon Bridge for $100 million, but that may not be enough to get the funds back.
Harmony offers a modest award
The Harmony layer-1 blockchain project team has offered a bounty equal to just 1% of the $100 million in crypto stolen from the Horizon Bridge hack last week.
Harmony tweeted on June 26 that the team had committed $1 million for the return of the funds that were stolen from the Horizon Bridge on June 23. It added, “Harmony will advocate for no criminal charges when funds are returned.”
However, concerns have been raised that the modest bounty sum may not be enough to incentivize the attacker to return the funds.
The Horizon Bridge is a token bridge between the Harmony blockchain and the Ethereum network, Binance Chain, and Bitcoin. The Bitcoin bridge was not affected in this exploit.
Compared to other high-profile exploits this year, Harmony’s bounty offer ranks low. The $10 million offered to the Rari Fuse attacker in May was 12.5% of the total stolen. The Beanstalk Finance team offered $7.6 million which was 10% of the total exploited from the protocol in April.
Harmony’s bounty offer is so low that the crypto trader known on Twitter as Degen Spartan called it an “insulting amount.” He added, “imagine losing 100m and thinking you’re in a position to lowball for a 1% bounty lmwo these people are just doing performance art to mitigate legal liability.”
In an incident response update on the Horizon bridge hack on June 25, Harmony founder Stephen Tse tweeted that the hack was not the result of a smart contract code breach, instead, the team found evidence that private keys were compromised which led to the breach of the bridge.
Tse said that the Ethereum side of the bridge had migrated “to a 4-5 multisig since the incident.” The vulnerability of the multisig wallet requiring just two out of five signers was brought up by a community member in April, but the issue was not addressed by the Harmony team until now.
A multisig wallet is a crypto wallet that requires multiple key holders to approve a transaction. These wallets are commonly used at crypto projects.
As of the time of writing, the Horizon Bridge hacker has not moved the stolen funds into Tornado Cash, an Ether (ETH) mixer, or any other anonymizer.
Hope is not lost for Harmony, as its $1 million bounty is not the smallest proportional to the amount of funds lost. In 2021, the Poly Network interoperability platform was hacked for $610 million. The team’s bounty offer of $500,000 was 0.08% of the total stolen. The offer was rejected, but luckily the funds were returned anyway.
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