Chronology of the $6.3 Billion Binance Security Breach
An analysis of the sophisticated multi-chain attack targeting Binance's internal infrastructure.
1Unprecedented Scale of Attack
On October 29, 2026, Binance suffered the largest hack in crypto history, losing approximately $6.34 billion across ten different blockchains. This incident surpassed the previous record set by the Bybit attack in February 2025. The breach involved a highly coordinated effort to bypass internal security protocols and drain hot wallet assets.
2Infiltration via Social Engineering
The attack originated months prior through sophisticated social engineering targeting DevOps engineers. Attackers used fake job interviews and malicious software, including a compromised Homebrew installer, to gain initial access. By October 20, they successfully compromised multiple employee devices, eventually obtaining a token with critical permissions to deploy malicious containers within the infrastructure.
3Exploiting EIP-7702 Mechanism
The attackers leveraged the EIP-7702 delegation mechanism to drain the Binance 14 hot wallet. By submitting a range of signed authorizations, they successfully executed a sweep function that moved $2.5 billion in a single transaction. This method allowed the attacker to maintain control over the wallet even after the exchange attempted to intervene.
4Multi-Chain Asset Extraction
While the Ethereum network was the primary focus, the attack was a multi-chain event. Assets were simultaneously drained from XRP Ledger, Optimism, Arbitrum, and Avalanche. The attackers utilized standard signed transactions for non-EVM chains, indicating a deep compromise of the exchange's internal transaction signing service rather than just a single protocol vulnerability.
5Rapid Asset Laundering Attempts
Post-theft, the attackers immediately moved to convert stolen stablecoins into ETH. They utilized UniswapX and the Aave lending protocol to obfuscate the origin of funds. Aave responded by temporarily freezing V3 and V4 markets to prevent further exploitation, while attackers sought to exchange assets for tokens that lacked centralized blocking capabilities.
6Industry-Wide Asset Freezing
A massive collaborative effort between Binance, stablecoin issuers, and security firms resulted in the freezing of approximately $3 billion in stolen assets. This rapid response was critical in mitigating the total loss. Analysts noted that the speed of coordination between centralized entities and blockchain security firms directly impacted the final outcome.
7Full Financial Compensation Commitment
Binance pledged to cover all user losses using its own resources and the SAFU insurance fund. The exchange reserved $6.34 billion to restore user balances, sourcing tokens through both market and OTC channels. This process faced challenges due to the low liquidity of certain assets, requiring careful management to avoid market impact.
8Attribution to North Korea
The FBI officially linked the attack to the North Korean-affiliated group TraderTraitor. Authorities identified specific Ethereum addresses used in the theft and urged global DeFi platforms and RPC operators to block these transactions. Despite the evidence provided by US agencies, North Korean officials denied any involvement, labeling the accusations as political provocation.
9Post-Incident Security Overhaul
Binance has since migrated its wallet systems to a new environment and replaced all compromised hardware. The exchange strengthened its AI-driven anomaly detection and internal access controls. Having prevented 57 similar threats in 2026, Binance is now collaborating with independent experts to establish a new security research fund for the industry.
Original article: INCRYPTED — Chronology of the $6.3 Billion Binance Security Breach