Main Riff:

G|--------------------------------|
D|--------------------------------|
A|--------------------3---5---3---|
E|-5---5--3---5-------------------|

That is played throughout the song. I didn't listen to any possible variations, you'll 
to search for them yourself ;)
When the drop comes, there is no bass playing, or it just plays one note all the time:

G|---|
D|---|
A|-3-|
E|---|

Enjoy ;)