Bybit said that its Group Risk Control team detected and blocked a series of coordinated fake deposit attacks across multiple blockchain networks, preventing potential losses of more than 1 billion DOT. The exchange said all attempts were neutralized in real time, with no funds incorrectly credited and no users affected.
The attacks were designed to trick exchange systems into crediting deposits that were never actually received. Bybit said one method used batch transactions in which a large transfer failed while smaller transfers succeeded, while another relied on multi-step transactions and ownership changes to create the appearance of incoming funds without any real net balance increase.
What stands out here is the kind of weakness the attackers were targeting: not wallets, but the logic exchanges use to decide whether a deposit is real. Bybit said its defense relied on atomic transaction checks, batch decomposition, ownership-aware tracking and balance-based validation, a reminder that in crypto infrastructure, the dangerous gap is often between what a transaction seems to show and what actually settled on-chain.
Source: Bybit.
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