# Binance Security Breach Results in Estimated $6.3 Billion Crypto Theft Compromised DevOps infrastructure leads to massive unauthorized withdrawals across multiple blockchain networks. - **Source:** [CryptoCurrency – Finance Magnates | Financial and business news](https://brifing.si/source/b5a2ce51-ec8e-4702-886b-778de5971605) - **Published:** 2026-10-30 - **Topic:** [Software & Engineering](https://brifing.si/c/engineering) - **Original article:** - **On Brifing:** https://brifing.si/s/1e7af5eb-38af-4af4-84ce-f6b7d6a5d354 ## Massive Security Breach Confirmed Binance confirmed a significant security incident resulting in an estimated $6.3 billion loss. Initial investigations point to a compromised DevOps engineer's laptop, which granted attackers access to a service container. This access allowed the unauthorized submission of withdrawal transactions, though the exchange maintains that no wallet private keys were leaked. ## On-Chain Data Analysis Security firm Blockaid identified that the attacker utilized a single Ethereum type-4 transaction containing 50 EIP-7702 authorizations. By targeting a Binance hot wallet, the attacker successfully delegated control to an unverified sweeper contract. This method allowed the perpetrator to drain approximately $1.6 billion in USDT and 167,464 ETH within minutes. ## Infrastructure Compromise Mechanism Blockaid CEO Ido Ben-Natan suggests the incident involved a compromise of the signing infrastructure rather than a direct key leak. The pattern mirrors the February 2025 Bybit hack, where $1.5 billion in Ether was stolen. The attacker used a Tornado Cash-funded address to operate the sweeper contract and execute the theft. ## Immediate Mitigation Efforts Binance has temporarily suspended all deposits and withdrawals to conduct thorough security checks. The exchange revoked the authorization of the affected address and is currently collaborating with law enforcement and blockchain intelligence partners. These teams are working to trace the stolen funds and identify the criminals responsible for this massive breach. ## Asset Recovery and SAFU The exchange has successfully frozen approximately $3 billion in affected assets on-chain through cooperation with blockchain partners. Binance has committed to covering all user losses using its Secure Asset Fund for Users (SAFU) and internal company funds. They maintain that user funds remain safe, despite the significant scale of the outflow. ## Discrepancies in Reported Figures While Binance estimates the total impact at $6.3 billion, on-chain data from Blockaid indicates at least $5.57 billion left Binance-linked wallets across Ethereum, Bitcoin, and Tron. The discrepancy highlights the complexity of tracking multi-chain outflows. Binance plans to publish an updated Proof of Reserves once the remediation process is fully complete. ## Historical Context of Breaches This event is currently described as the largest cryptocurrency theft on record, surpassing the February 2025 Bybit incident. Binance continues to face various operational challenges, including a £150M lawsuit from 1,692 retail derivatives traders filed in July. The exchange has not yet provided a specific timeline for resuming normal platform operations. ## Future Technical Transparency Binance has pledged to release a detailed technical post-mortem once the investigation concludes and facts are verified. The exchange urges users to rely solely on official channels for updates regarding the incident. The industry awaits further clarity on how the signing infrastructure was breached and how user funds remain protected. ## Sources covering this story - https://www.financemagnates.com/cryptocurrency/binance-hacked-estimated-63-billion-in-crypto-drained/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._