These are the main tabs, however there are minimal variations so feel free to improvise...
Chorus / VERSE (00:03 - 1:11)
G|-----------------------------------|
D|---------1-1-1-1-------------------|
A|-----------------4-4-4-4-1-1-1-1---|
E|-1-1-1-1---------------------------|
HOOK (1:11 - 1:34)
G|--------------------------------------------------|
D|--------------------------------------------------|
A|----------------------------------4-4-4-4-1-1-1-1-|
E|-4-4-4-4-4-4-4-4-1-1-1-1-1-1-1-1------------------|
G|-------------------------------------------------/3-----|----------|
D|--------------------------------------------------------|----------|
A|----------------------------------4-4-4-4-1-1-1-1-------|----------|
E|-1-1-1-1-1-1-1-1-4-4-4-4-4-4-4-4------------------------|-1--------|
VERSE (01:42 - 2:11)
G|-----------------------------------|
D|---------1-1-1-1-------------------|
A|-----------------4-4-4-4-1-1-1-1---|
E|-1-1-1-1---------------------------|
HOOK (1:11 - 2:34)
G|------------------------------------------------------------------|
D|------------------------------------------------------------------|
A|----------------------------------4-4-4-4-4-4-4-4-1-1-1-1-1-1-1-1-|
E|-4-4-4-4-4-4-4-4-1-1-1-1-1-1-1-1----------------------------------|
[ Tab from: https://www.guitartabs.cc/tabs/s/serj_tankian/harakiri_btab.html ]
G|---------------------------------------------------------/3-3-3-3-|
D|------------------------------------------------------------------|
A|----------------------------------4-4-4-4-4-4-4-4-1-1-1-1---------|
E|-1-1-1-1-1-1-1-1-4-4-4-4-4-4-4-4----------------------------------|
Chorus (02:34 - 3:22)
G|-----------------------------------|
D|---------1-1-1-1-------------------|
A|-----------------4-4-4-4-1-1-1-1---|
E|-1-1-1-1---------------------------|
HOOK variation (3:22 - end)
G|--------------------------------------------------|
D|--------------------------------------------------|
A|---------------------------------5-5-5-5-2-2-2-2--|
E|-5-5-5-5-5-5-5-5-2-2-2-2-2-2-2-2------------------|
G|--------------------------------------------------|
D|--------------------------------------------------|
A|---------------------------------5-5-5-5-2-2-2-2--|
E|-2-2-2-2-2-2-2-2-5-5-5-5-5-5-5-5------------------|
G|--------------------------------------------------|
D|--------------------------------------------------|
A|---------------------------------5-5-5-5-2-2-2-2--|
E|-5-5-5-5-5-5-5-5-2-2-2-2-2-2-2-2------------------|
G|-------------------------------------------/4-4--|
D|-------------------------------------------------|
A|-5-5-5-5-2-2-2-2-5-5-5-5-2-2-2-2-5-5-5-5-2-2-----|
E|-------------------------------------------------|
G|---------------------------|
D|---------------------------|
A|-2-------------------------|
E|---------------------------|
