How Did the Binance Hack Happen? Detailed Investigation of the $6 Billion Heist

On October 29, 2026, an attacker drained about $6.15 billion from Binance in 31 minutes, one of the largest thefts in crypto history, or rather, internet history. Binance first put losses at $6.3 billion; blockchain analytics firm BitOK’s transaction-by-transaction tracing puts them at $6.15 billion across nine blockchains. The attacker never stole Binance’s private keys. Instead, they made Binance’s own systems approve the theft. This guide follows the heist in order and explains each technical term along the way. All times are UTC. The Basics: How an Exchange Moves Money Hot wallets are an exchange’s online wallets, kept connected so withdrawals go out quickly. Signing. Every transfer must be approved with a wallet’s private key, a secret number. Exchanges use automated systems to sign thousands of payouts a day.

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