Level spoiler:

There are 2 ways in which you can hack into GlobalDevelopmentBank.com

1. Hack the 2 AI controlled servers and bounce through them. 
This is the easy but risky path.
They can retaliate anytime and trash your host (reduce your server integrity to 0).

2. Wait until the EMP and DOS are charged, and hack the 2 datacenter servers.
You can bounce through them to hack GlobalDevelopmentBank.com
This is the hard way (your time is very limited) but it's risk free.

Feel free to improvise! 