My tron funds vanished, I just want to understand why

Hi, Background: Had around 74$ in TRX + USDT on TronLink for years (didn't touch them). My last action was to unstake month ago all staked. Yesterday I received two notifications, first sent all my USDT to one account, the next one, send the TRX . I do not remember to have pasted my seed anywhere (the most plausible cause) My computer should be virus free (I use it for almost nothing, also I have…