Wow - this is interesting.  This thing has been lurking around since 2011 - and we just barely found it.  I wonder what else has NOT been discovered:

http://abcnews.go.com/US/trojan-horse-bug-lurking-vital-us-computers-2011/story?id=26737476

I hate to sounds paranoid (like I am), but they are coming for us......  When is completely open for debate - but you do not do this unless you plan on using it for extortion or realz.