Suspicious Transaction on Arbitrum Chain Results in Significant Loss

According to PANews, BlockSec has detected a suspicious transaction involving the FutureSwapX contract on the Arbitrum chain, resulting in an estimated loss of approximately $395,000. BlockSec has attempted to contact the team responsible for the contract but has not yet received a response. The attacker reportedly exploited multiple changePosition operations to steal funds, ultimately withdrawing USDC. As the contract is not open-source, the exact cause of the incident requires further investigation. On-chain behavior suggests the event may be linked to unexpected changes in stable balances during early position updates, which led to the release of USDC during position reduction or closure.