PS: I'm fairly confident I got this right, but someone feel free to double check me.. i only got into crypto a few months ago so maybe I'm misinterpreting what these logs represent.
Crawled through some numbers again.
Yeah markanth is definitely right: Gf7 is Clevermind!
Gf7w (tag Clevermind) deposits the coins on Bittrex GQsU
I can see is its Bittrex because GQsQ appeared as an input in some of my withdraws from Bittrex.