I tried to figure this out..idk if this is miner's fee, Trustcoin fee, some hidden Bittrex fee, change address?? (which isn't mine), Virus??
If it is indeed the "first" transaction from your wallet, I would have to guess that it is the TrustedCoin "prepaid" fee of 0.005 which got calculated wrong? The fact that your "payment"... along with a bunch of other 0.005 and 0.002 payments (the 2 prepayment amounts for TrustedCoin) were then aggregated in this transaction would tend to support my hypothesis.
If you click the blue shield in the bottom right corner of the wallet, it should tell you how many credits you have left... is it 99? Or a lower value? Maybe this is a slight glitch in the system where if you don't have enough to meet the payment amount selected and you have 0 credits... it just takes whatever it can?
In any case... you coins haven't been stolen or lost... they were used to prepay your TrustedCoin 2FA fees...