They really are not that hard too make.
Global Ban's = 1
Used Keys = 0
Want to buy a Script Executer / injector - add my skype Phenrir33 and we can talk.
Coding Languages + Experience
C++ - 4years
Pyton - 3years
Java - 5years
eAthena - 3years
Basic Scripting 5+years
There's some open source key stealers floating over there, but you will need to obfuscate and do the PHP security by yourself.