I made a transfer to Bittrex, took the whole day to confirm..on top of that I noticed that 0.0043778 were transferred to this address: 1K3UKJAug32tZvLnJpewAKQkxkBzb7Pqzy

Transaction: https://blockchain.info/tx/30cd1ce7776d59a91dfd4573b7537b0dee151671f184109842234dd8fae1dd22

I'm using Electrum 3.0 (2Fa) and this is the first I'm sending money from it.

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??
I'm confused and a bit frustrated from this weekend