Identifying a program-specific keylogger

.. Okay, so lets say that you're having a keylogging issue with just one program. Does anyone know of any software that can, say...

Detect programs interacting with another specific one.

For example, we'll call the program in question Program A.
The keylogger is Program B.


Is there any piece of anti-malware software that would be able to show all other programs interacting with Program A at any given point, in order to hopefully root out Program B?



In case anyone needs further clarification, I'm currently dealing with an annoying World of Warcraft account keylogger, which, from what I gather, is transmitting the password string to it's host upon successful login. I've tried identifying it by watching active network activities via Online Armor Firewall, as well as process explorer. No help. I've also briefly glanced through my HJT logs for new entries, and anything suspicious. Still no luck.

Help??