From August 26 to 27, 2025, BetterBank, a decentralized finance (DeFi) protocol operating on the PulseChain network, fell victim to a sophisticated exploit involving liquidity manipulation and reward minting.
The attack resulted in an initial loss of approximately $5 million in digital assets. Following on-chain negotiations, the attacker returned approximately $2.7 million in assets, mitigating the financial damage and leaving a net loss of around $1.4 million. The vulnerability stemmed from a fundamental flaw in the protocol’s bonus reward system, specifically in the swapExactTokensForFavorAndTrackBonus function.
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Source: Kaspersky
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