A:   577655
F#m: x-9-11-11-10-9
B:   799877

I think it's mostly just Em A F#m B all the way thru.
(although in the chorus maybe use A7 instead of A)

The main riff goes something along the lines of:

  Em    A            F#m   B
E|--7------------------------------|
B|-----8--7--7--8--10--10----------|
G|-------------------------9/11----|
D|---------------------------------|
A|---------------------------------|
E|---------------------------------|