HTX (formerly Huobi)

What happened

On 24 September 2023 roughly 5,000 ETH — about $8 million — was taken from a single HTX hot wallet. The exchange identified the attacker, negotiated the return of 95% of the funds and paid the remaining 5% as a white-hat bounty. Customer balances were covered in full.

What to take from it

Negotiating money back worked because the amount was small and the trail was public. That is an outcome, not a security control — no exchange can promise you the next attacker will take the deal.

Dates and figures are widely reported public estimates from coverage at the time, not KripZen's own audited data.