OSN Token Hack

Reported loss $110K
Flash Loan Attack

What happened

On May 6, 2024, a series of transactions exploited OSN's liquidity-provider reward mechanism on BNB Chain. The published analysis estimates the resulting asset loss at approximately $110,000.

How it happened

  1. Transfers into the liquidity-pool path invoked OSN's dividend-sending logic, which sold OSN and sent BUSD to OSNLpDividendTracker.
  2. The attacker repeatedly bought and sold OSN, causing the tracker to accumulate rewards.
  3. Using multiple attack contracts, the attacker added liquidity and then received the tracker rewards intended for liquidity providers.

Protocol details

Classification Token
Protocol Type Exploit/Flash Loan Attack

Evidence

Understand the attack patterns

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