Svmuureported that Humility Protocol released a security incident update on the X platform, stating that its H token suffered a coordinated attack on the Ethereum and BSC chains yesterday, with confirmed losses exceeding $36 million in stolen and dumped assets.
Preliminary investigations indicate the incident originated from a compromised employee computer, which led to the leakage of private keys for the multi-signature wallet controlling the Hyperlane Bridge ProxyAdmin. Specifically, the attacker obtained 3 out of 6 private keys of the Gnosis Safe wallet on the Ethereum chain, transferred ownership of the ProxyAdmin to a wallet under their control, upgraded the bridge contract to a malicious implementation, and subsequently transferred approximately 141.2 million H tokens in a single transaction.
Simultaneously, the attacker also gained control of 3 out of 5 private keys of the Safe wallet on the BSC chain, took over the ProxyAdmin using the same method, deployed a malicious contract with unlimited minting functionality, and minted 200 million H tokens in two separate transactions to their own wallet.
Humility stated that it has suspended all deposit and withdrawal operations on the affected bridge services and is collaborating with partners such as exchanges to mitigate losses. Meanwhile, it is cooperating with the police investigation and attempting to recover part of the stolen funds.