This riff is played all the way through the song:

(Palm Muted)
E------------------------------------------------------------------------
B------------------------------------------------------------------------
G------------------------------------------------------------------------
D-------12------------12------------13------------13---------------------
A-12-12-12-12-/-12-12-12-12-/-13-13-13-13-/-13-13-13-13------------------
E-10-10-10-10-/-10-10-10-10-/-10-10-10-10-/-10-10-10-10------------------