Bybit Blocks $1 Billion in Fake Deposit Fantasies, Because Not All 'Deposits' Are Created Equal

Bybit's Group Risk Control team just pulled off a heist prevention that would make Ocean's Eleven jealous—intercepting a coordinated wave of fake deposit attacks across multiple blockchain networks and stopping more than 1 billion DOT in potential losses before any funds were incorrectly credited. The attackers apparently thought they could print money by pressing the "deposit" button really hard. Spoiler: you can't.

The attacks were neutralized in real time. No users were affected. No assets were mistakenly added to accounts. Basically, Bybit's systems looked at the fake deposits, squinted, and said "nice try, buddy" before sending them to the dustbin of failed crypto crimes.

The schemes relied on techniques designed to fool exchange deposit scanners into treating nonexistent or unconfirmed transfers as legitimate deposits. Attackers attempted to make transactions appear legitimate at the system level, even when no actual net balance increase had occurred. Think of it as the blockchain equivalent of those emails promising you've won $10 million in a lottery you definitely didn't enter.

How the Attacks Worked

Some attempts used batch transaction structures, where multiple transfers are bundled into a single operation. In one case, a large transfer was set up to fail while smaller transfers within the same batch succeeded. This could confuse systems that check only the overall transaction status rather than examining each component separately. It's like ordering a steak dinner but only paying for the complimentary breadstick—the restaurant's accounting software might initially think you're square, but eventually someone checks the actual steak.

Other attackers used multi-step transaction flows combined with ownership changes to simulate incoming funds without producing a real balance increase. This is roughly equivalent to rearranging furniture in your apartment and then demanding your landlord acknowledge you've acquired new furniture. Technically there's movement, but nobody's actually buying anything.

Bybit's Defense

Bybit's deposit monitoring framework catches these edge cases with a layered validation process that probably required more coffee to build than most crypto founders drink in a year. The system scans full on-chain data, filters transactions against deposit addresses and related account structures, and validates each transaction down to its atomic components—because apparently, even atoms need to be verified these days.

This includes inner transaction verification, batch decomposition, transfer method recognition, ownership-aware tracking for account-based chains like Solana, and balance-based validation to confirm actual asset movement. In short, Bybit isn't just checking if the mail was delivered—they're opening every envelope, checking the handwriting, and calling your mom to verify you actually ordered that thing.

Suspicious activity is scored by severity based on structure, complexity, and potential financial impact, with real-time alerts triggering internal review. Basically, the system rates each attempted attack on a "how stupid do you think we are" scale, and these ones were scoring pretty high.

"Whether attackers use batch calls, relayed transactions, multi-instruction flows, or ownership manipulation, our system decomposes every transaction to its atomic operations and validates each one independently," said David Zong, Head of Group Risk Control and Security at Bybit. "This ensures that only genuine asset movements are recognized." Translation: we're not falling for your shenanigans, no matter how creatively you spell "deposit."

Context

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