Why is it "almost undetectable to any antivirus software"? It hasn't been used in the wild therefore they haven't taken its signature? There's no sarcasm in my question, I genuinely want to know this.
Then I tested it in my institute's Computers (wishing to find any weakness). My friends use crazy anti-viruses in their PCs but neither of them could catch it. It helped me to make some changes though. I of course have removed them later. :) (It was more than a year ago.)
As I have not tested the program rigorously in all environments, I used the phrase- "almost undetectable".
Thanks a lot for your query.