Safe, the developer behind Bybit’s multisignature product, has released a post-mortem update addressing the recent $1.4 billion cybersecurity incident that affected the exchange. However, Binance co-founder Changpeng “CZ” Zhao has expressed dissatisfaction with the response, calling for greater clarity on several critical details. analyses suggest the compromised machine was modified to target the Bybit Safe and divert transactions to a different hardware wallet. “, according to Martin Köppelmann, co-founder of Gnosis, the blockchain network that developed Safe. “The update from Safe is not that great. It uses vague language to brush over the issues,” CZ wrote on X. “He also inquired about the specifics of how the hackers exploited multiple signers, how they accessed Bybit’s systems, and why they didn’t target other addresses instead. “, according to Martin Köppelmann. In a separate statement, Sygnia and Verichains conducted a forensic review, revealing that “the credentials of a Safe developer were compromised […] which allowed the attacker to gain unauthorized access to the Safe(Wallet) infrastructure and deceive signers into approving a malicious transaction.”. “, according to Martin Köppelmann. A detailed analysis by Elliptic has further traced the stolen funds through a large network of over 11,000 wallets controlled by Lazarus Group.