How to check Programs

I'll help you for a price.

Jesus, you guys are so secretive.

Just download Bintext, which you can get from McAfee.

Open a .exe you suspect of being a keystealer, and examine the code.

Usually within the first few lines, it says "CD_Key_Stealer", and later on, has a website in which the keys are uploaded.

Some have the website hidden, but still have paths to your key, indicating that it can be stolen.

I'll tell you how I've tested it so far, for a price, that price is FREE.
Run a program in sandboxie and since it can't find it's goal, it usually just breaks apart giving a cmd telling you that it is, kind of

Knowledge wants to be free, so does potato chips.

Here is the most effective way:
Don't be a idiot and download a ".exe DayZ Bypass Undetected" from Youtube.

Nowhere in this thread is youtube even mentioned.
Except for your post.

I personally use ILSpy. It is a decompiler and then I view the source to search for the code that steals the key. Msg Ralexk97 on skype and I will show you everything

i think you can check it with sandboxie

You can, I've tried a few.

You can decompile it with Olly