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Binance Hacker Bypasses Stablecoin Freezes Using DeFi Protocols

Binance Hacker Secures Stolen Funds Through DeFi Protocols – How TraderTraitor Bypassed Stablecoin Freezes Using Aave and UniswapX

Key Takeaways

• North Korean hacking group TraderTraitor executed an initial $3.79 billion sweep on the Ethereum network.
• The attacker deposited $60 million in USDT on Aave to borrow 19,760 WETH before stablecoin issuers could freeze the assets.
• An additional $325 million in USDT was swapped through UniswapX and 1inch, costing the hacker a 10 percent fast-track premium.
• Tether and Circle initiated asset freezes at 21:18 UTC, but the attacker had already secured 420,000 unfreezable ETH.

Attacker Sweeps Billions From Binance Hot Wallets

The individual or group behind the recent Binance exploit has been confirmed as North Korea’s TraderTraitor. This attacker executed an initial $3.79 billion sweep on the Ethereum network on Thursday, October 29. The stolen funds consisted of 200,630 native Ethereum tokens alongside massive amounts of stablecoins. Analysts noted that over $325 million was cleared from Binance’s hot wallets without any human review triggering a pause.

Centralized exchanges typically employ withdrawal caps and manual reviews to prevent such large-scale capital flight. Decentralized and non-custodial platforms operate on smart contracts designed to function without human intervention. The attacker leveraged this exact structural difference to secure the stolen assets before centralized entities could intervene.

Hacker Pays Premium To Bypass Imminent Stablecoin Freezes

Stablecoin issuers maintain the technical ability to freeze tokens associated with illicit activity. Knowing that Tether and Circle would quickly blacklist the stolen USDT and USDC, the hacker initiated a rapid laundering sequence. TraderTraitor swapped $325 million USDT using UniswapX and 1inch between 21:09 UTC and 21:34 UTC.

This process took approximately 35 minutes to complete. The attacker was forced to pay a 10 percent premium on the swapped amount to fast-track the network orders. Tether and Circle successfully began freezing the stablecoins at exactly 21:18 UTC, halting any further conversions. The hacker still managed to move the bulk of the funds before this centralized block took effect.

Aave Serves As Conduit For Rapid Asset Conversion

The attacker utilized the decentralized lending protocol Aave as another primary avenue to outsmart the stablecoin freezes. TraderTraitor deposited $60 million in USDT as collateral on the platform. The hacker then borrowed 19,760 Wrapped Ethereum (WETH), valued at $45.13 million, against that frozen collateral.

This specific borrowing action required only five minutes, occurring between 20:58 UTC and 21:01 UTC. The hacker immediately unwrapped the WETH to receive 142,062 native ETH, which cannot be frozen by any centralized issuer. The combination of the original 200,630 ETH, the unwrapped 142,062 ETH, and other swapped assets left the attacker holding a total of 420,000 unfreezable ETH.

Aave Founder Denies Claims Of Protocol Bad Debt

Market observers quickly drew comparisons between this incident and the previous KelpDAO hack. That prior exploit leveraged a similar decentralized finance lending loophole to launder stolen funds, leaving Aave with over $120 million in bad debt. Aave founder Stani Kulechov rejected claims that the Binance incident created a similar liability for the protocol.

Kulechov stated that the protocol holds no bad debt from this event because the loan remains over-collateralized with stablecoin collateral. The situation does leave Aave holding frozen USDT collateral while the hacker retains the highly liquid, borrowed ETH. It currently remains an open question whether Binance, as the primary victim, or Aave will ultimately recover the frozen $60 million.

Blockchain Analysts Issue Urgent Upgrade Warnings

The scale and speed of this exploit highlight the vulnerabilities within automated infrastructure. Chainalysis has publicly advised all platforms running Ethereum wallets affected by the specific bug used in this attack to upgrade their systems immediately. The security firm urges maximum vigilance for any protocol utilizing similar non-custodial wallet setups.

The attacker successfully pre-empted the industry’s standard countermeasures by using decentralized liquidity pools. The speed of smart contracts ultimately outpaced the manual intervention required by centralized stablecoin issuers.

Our Assessment

This incident demonstrates a critical structural gap between decentralized finance protocols and centralized stablecoin controls. The attacker successfully used Aave and UniswapX to convert hundreds of millions of dollars in freeze-vulnerable tokens into native, unfreezable assets. The five-minute execution time on Aave and the willingness to pay a 10 percent premium on decentralized exchanges allowed the hacker to outpace the centralized blacklisting process. The event leaves Aave with frozen collateral and raises ongoing questions regarding automated hot wallet security and liability resolution between primary and secondary victims.