I'm not a thrash metal fan (I've probably embarresed myself there by picking the wrong genre, apologies if I have ( I am getting on a bit)). The guitars I like because it reminds me of early sabbath. For me the bass is not defined enough. For me I like to give a bit of boost around 90hz and then something around the top end between about 2-6khz to give it a bit of crunch. This seems to work with my set up (but I've heard a lot guys on here who sound a lot better than me). You probably need a heavier snare sound with a shortish reverb to thicken it up and give it some space. Cymbals also seemed a bit splashy and distant.
It might be a good idea to let us know what setup you're using, you are bound to get asked that and it will give a better idea of what you can do. Hope this helps, but like I say, there are others here who can give you better advice I'm sure.
if you've only just started out it's a pretty good start. Keep it up.