It is not real, OP is suggesting that it be written. I was so very tempted to write it. The only downside to writing it is that once you have it in circulation

It is not real, OP is suggesting that it be written. I was so very tempted to write it. The only downside to writing it is that once you have it in circulation, it moves the goal posts and rootkit authors with some skill will use less obvious techniques to hide their software.