Opsek founder says Binance attackers may have had access for weeks before the hack

The biggest digital asset heist on record may have started long before anyone noticed. Opsek founder Pablo Sabbatella suspects the attackers behind the Binance breach were inside the exchange's systems for weeks before they ever moved a coin.

That matters because the theft itself was fast. If Sabbatella is right, the speed was the final act of a long, patient setup. On October 29, 2026, attackers drained approximately $6.3 billion worth of digital assets from Binance's hot wallets.

Hot wallets are the internet-connected accounts exchanges keep for day-to-day withdrawals, the crypto equivalent of a cash register rather than a vault. Sabbatella's analysis of the timeline points to a highly organized operation.

Methodical Operation

The bulk of the funds left in a window of roughly 20 minutes, spread across at least 10 blockchains. And the groundwork appears to have been laid well in advance. Staging activity tied to the hack began at least 36 hours before the cash-out, according to the analysis.

Sabbatella's broader suspicion goes further. He believes the intruders had gained access weeks earlier, quietly mapping Binance's internal systems before they acted.

Attack Entry Point

The entry point was likely a compromised laptop belonging to a DevOps engineer. DevOps staff sit where software development meets live infrastructure, so their machines often carry the keys to systems that run in production.

From that foothold, the attackers reportedly reached a service container. A container is a packaged, self-contained piece of software running a specific job inside a company's infrastructure. Gaining control of one let the intruders execute unauthorized withdrawals.

Security analytics firms TRM Labs and Chainalysis, along with the FBI, have attributed the attack to TraderTraitor. The group is associated with North Korea.

Response and Impact

The previous record for a digital asset theft was the roughly $1.5 billion heist tied to Bybit. The Binance breach is more than four times that figure, which redraws the ceiling on what the industry thought a single attack could cost.

Binance moved quickly after the breach. Working with stablecoin issuers, the exchange froze about $2.7 to $3 billion of the stolen funds. Stablecoins are tokens pegged to traditional currencies, and their issuers can often freeze specific balances on their networks.

That makes them one of the few parts of crypto where stolen money can be stopped after it has left the building. Binance also committed to covering approximately 90-95% of the stolen assets using corporate funds and reserves.

Security Implications

The most uncomfortable takeaway from Sabbatella's analysis is that the visible part of the attack was the shortest part. If attackers had weeks of quiet access, then the 20-minute drain was less a break-in and more a scheduled checkout.

That shifts the security conversation. Exchanges have long focused on hardening wallets and withdrawal systems. A breach that starts on an engineer's laptop suggests the weakest link may be ordinary staff devices and internal access controls, not the cryptography.

The incident is pushing platforms toward what security professionals call an 'assume compromise' mindset. Instead of trusting that the perimeter will hold, companies operate as if an intruder may already be inside, and design systems so that a single compromised machine cannot reach the money.

The freeze of about $2.7 to $3 billion offers a partial counterweight. It shows that coordination between exchanges and stablecoin issuers can claw back a meaningful share of stolen funds, at least for assets that issuers can control.

The remaining question is what investigators find when they reconstruct those earlier weeks. If Sabbatella's suspicion holds, the lesson for every exchange is that the alarm needs to go off during the quiet part, long before the 20-minute sprint begins.