How to Break in and Stay in (Video)
In this tutorial i explain how easy it can be for one to hack into your computer or network and maintain his access at any later time. The art of hacking comes only when you can break in and stay in. Most attacks are realized as soon as they take effect, and the victim is likely to block or patch the attack. In such a case you will need to have a way through which you can still get in without having to run a pile of exploits on the victims box. We look at how useful Meterpreter services (metsvc) can be and how you can crack password hashes in a few seconds. I demonstrate the use of filter files with ettercap to make a spoofed attack. I hope it helps 
Part One:
http://www.youtube.com/watch?v=Q4a76gEF5nY
Part Two:
http://www.youtube.com/watch?v=gPM8x7cPhBs
The filter file can got from http://blindsecurity.org/filter.html