Security is for World Area , not specially area same iran or ... .
Now many AV Venders give Service to Iranian users :
kaspersky , symantec , bitdefender , g-data , panda , avira , ESET & etc .
Also Iranain Cyber Police is organization same FBI for Wanted of cyber criminals .
Do you know means Police and know about their tasks ?
I give you that, Cyber Security is a International Arena.
However, with the recent NSA leaks I hardly doubt the fact that NSA is the only agency that attempts to bribe their way into anti-malware agencies to white list stuff or make stuff undetectable.
Maybe you trust . ( only maybe and need trust documents )
must attention NSA is Different with Police Organizations .
Also base you Talk , this means Users can not trust any AV software ! yes ?
But We force use Good AV for Security .