What happened
On May 6th, OSN Token contract was exploited with a hacker's profit of about 110k USD.
On May 6th, the address 0x835B4 exploited the OSN token via the unverified exploiter contract 0x4a5ac. During multiple transactions, the exploiter repeatedly added liquidity using flashloan from the Pancake V3 pool and then performed buy-sell operations, which generated rewards for LP holders via the OSNLpDividendTracker contract, followed by removing liquidity. This allowed the attacker to gain unfair rewards worth approximately $110,000 USD.
Attacker:
https://bscscan.com/address/0x835b45d3…5bc502
Attacker contract:
https://bscscan.com/address/0x4a5acac3…8dafc2
Example of exploit tx:
https://bscscan.com/tx/0x03db9050…ee6681
Case & protocol details
Evidence & learning
Attack pattern
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