According to CoinMeta, the blockchain asset management protocol Swan Treasury suffered losses of approximately $625,000 due to a leakage of signature keys. The attackers utilized the leaked offline signature keys to purchase STY tokens at a significant discount and profited from it. According to a report by the blockchain security company Defimon Alerts, the attack occurred on the BNB chain. The attackers bypassed the protocol's purchase restrictions by generating valid signatures and used around 19,700 USDT of PancakeSwap lightning loans to obtain nearly 687,000 STY tokens. This incident highlights the ongoing risks associated with private key security in the cryptocurrency industry.