So I downloaded a wallet for a cryptocurrency that I will leave anonymous. I loaded my coins and made several transactions. I open my wallet daily, but about a month after my last transaction, I opened my wallet and find that all these transactions had occurred that I had not made. But the curious thing was these transactions were backdated before other transactions I had made. So transactions I had actually made were no longer in my transaction history, but the currency was still in the wallet I sent it to. But these fake transactions, that were back dated emptied my wallet out. I don't understand what kind of hack this was. Does anyone know.

Thanks