How do I crack substr hash?

[Flyinghaggis]

Sorry hadn't noticed the age of the original thread and didn't want to double post about something that has been covered (long time ago right enough) already.
Thanks for posting your programme.

Normally I'd be all like "THREAD NECRO" and ban you for posting on a thread that's almost 3 years old, but since it's kind of my fault that you did so, I can't really get mad.

I'm not entirely sure if this is the "final" version of this program or not, but it should probably mostly work.

http://strcpy.io/md5substr.c

Edit: Just read that you're actually looking for substr(md5($pass),12,20) so this program won't work as-is, but I trust you can modify it to suit your needs.