Key Takeaways:
South Korean police requested Binance to freeze roughly $370,000 in stolen SOL, but the exchange only locked $75,000 – a mere 17% of the identified funds.
Authorities report a 15-hour lag between the urgent freeze request and Binance’s action, a window that security experts argue allowed hackers to wash the funds.
The attackers utilized complex cross-chain bridges and privacy tools like Railgun to obfuscate the trail of the $37 million total stolen loot before exchanges could react.
The aftermath of the massive Upbit hack has shifted from a technical post-mortem to a heated regulatory standoff. South Korean authorities are openly questioning the emergency response protocols of Binance, the world’s largest cryptocurrency exchange, after it reportedly failed to freeze the vast majority of stolen funds traced to its platform..
“Too Little, Too Late”: The 17% Controversy
The core of the dispute lies in the numbers. Investigators from the Korean National Police Agency successfully traced 470 million won ($370,000) of the stolen Solana directly to wallets hosted on Binance. Expecting immediate cooperation, they filed an urgent request to freeze the entirety of these assets.
However, the result was underwhelming. Binance ultimately locked only 80 million won ($75,000), covering just 17% of the requested amount.
For law enforcement, this gap is unacceptable. In the high-speed world of crypto forensics, the difference between a full freeze and a partial one often determines whether victims get cents on the dollar or nothing at all. The 83% of funds that remained unfrozen likely slipped through the net, cashed out or swapped before the compliance hammer fell.
Binance Partially Freezes Funds Linked to Upbit Hack After Requests
The 15-Hour Lag That Cost Millions
Perhaps more damning than the amount frozen is the timeline of the action. Reports indicate that it took roughly 15 hours from the initial “red alert” request for the freeze to be confirmed.
In traditional finance, 15 hours might be a standard processing window. In crypto, where funds can be bridged across three blockchains and mixed through a privacy protocol in under ten minutes, 15 hours is an eternity. Security professionals argue that emergency response teams at top-tier exchanges must operate on a near-real-time basis.
A delay of this magnitude transforms a traceable exploit into a cold case. By the time the freeze was executed, the hackers had ample time to execute what is effectively a digital “shell game,” moving assets out of reach while compliance teams were presumably still conducting due diligence.
Sophisticated Laundering via Railgun and Bridges
To be fair to Binance, the attackers – suspected to be linked to the notorious North Korean Lazarus Group – did not make it easy. They didn’t simply dump SOL onto a central exchange.
On-chain analysis reveals a sophisticated laundering strategy. Immediately after the breach, the loot was fragmented into hundreds of smaller transactions. The hackers utilized cross-chain bridges to hop between networks and privacy protocols like Railgun to sever the link between the sender and receiver.
This creates a dilemma for exchanges: How do you freeze funds when the provenance is obscured by a mixer? However, critics argue that the specific tranche of $370,000 traced to Binance was likely identifiable before it was fully washed, making the 15-hour delay the primary failure point rather than the technical obfuscation.
Binance’s Defense and the Regulatory Backlash
When pressed for answers, Binance maintained a guarded stance. The exchange declined to discuss specific operational details, citing ongoing investigations, and issued a standard statement affirming that it “continues to cooperate with relevant authorities.”
This generic corporate response has done little to quell the frustration in Seoul. South Korean lawmakers are already using this incident to call for stricter, mandatory cooperation rules. The discussion is pivoting toward standardized global protocols where “Urgent” means “Instant.”
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