This is not transferring your u, this is transferring you fake u

Previously, the wallet was very cautious about risk control and did not engage in high-risk transactions, nor did it hold much U. Today, I saw a BNB DeFi task, transferred U in to complete the task, and after finishing the task, I found in the transaction history that someone was frantically transferring my U. What is going on? Is this wallet no longer usable? $BNB