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Here is a brief version of how the Binance hacker did it : hacker ran a months-long campaign of social engineering and malware against Binance staff. theblock.co • In June they tricked a wallet DevOps engineer into installing a tampered AI coding tool (via a fake Homebrew package). • In September they ran a fake job-interview process on another engineer (fake company, staged interviews with “CEO,” personal social-media credibility), then had them download a malicious coding assignment containing zero-day malware onto a work computer. It bypassed endpoint security. coindesk.com They used the compromised laptop plus an internal AI tool to pivot, steal credentials, and reach more wallet engineers’ machines. On October 29 they deployed a container and ran a malicious script that gave them control of Binance’s internal wallet-signing service. From there they made Binance’s own signers authorize large unauthorized transfers across multiple chains (XRP, SOL, OP, BTC, ETH, etc.) — no private-key theft, just key/signing-system misuse. cryptobriefing.com On Ethereum they specifically used EIP-7702: they got the busy “Binance 14” hot wallet to sign 50 authorizations (covering consecutive nonces so one would match) that delegated the wallet to an attacker-controlled sweeper contract. Once one authorization stuck, the wallet ran the attacker’s code and could be drained (and kept being drained as new deposits arrived) until Binance revoked the delegation on-chain hours later.