The attacker began with a 5 USDT transaction before draining eight TRON wallets of 6.04 million of the dollar-pegged stablecoin in about an hour. On Ethereum, three wallets were simultaneously emptied of 1.89 million USDT and 77 ETH, which was swapped to ETH via 1inch through a wallet created the same day.
Onchain records show the two chains were linked through cross-chain swapper Bridgers, whose Ethereum payout contract sent funds directly into the Ethereum swap wallet, connecting what appeared to be separate operations into a single incident.
The attacker routed some 79% of the stolen funds through instant exchange FixedFloat using roughly 50 single-use addresses. ChangeNOW separately froze a six-figure sum after being contacted by Specter Investigations .
Around 282 ETH, roughly $542,000, across five addresses remains unmoved.
Within 24 hours, Coinsbuy refilled the drained wallets to within 0.05% of their pre-attack balances — behavior researchers say indicates the team does not believe private keys were compromised. The attack vector has not been established.
Coinsbuy told CoinDesk that the incident has been “contained” and that “all affected amounts have been covered in full by the company from its own reserves.”
The company added: “No client has borne any loss. The platform is stable and operating normally. Investigation is underway, and we cannot disclose further technical details at this stage.”
The incident adds to an increasingly costly year for the industry, which had already seen roughly $972 million stolen across the sector through late July.