pass phrase incorrect

Hello all,

My wallet is finally synchronized (after 5days non-stop) and I revieved my coins (500K).
As the idiot I am I cant remember my pass phrase (I used a VERY simple one and I am sure its the right one so…very very and I tried a lot of variaties).

What can I do ? Is there a easy to use program to brut force attack the wallet?

My coins doubled up from 500 dollar to 10oo dollar. I want to change some (through ShapeShift) in diffrent coins.