If we know about it why aren’t we getting rid of it?
Trojan horses are not simple cleaning. When they’re state-sponsored Trojans, you’ll have little luck getting rid of it in totality.
Further, MUCH of our infrastructure is running on old hardware and software. Last I read, much of our nuclear infrastructure is running on old NIX, Solaris, and even Windows 98 operating systems.
Odd how this report would be published two days after our Mid Terms.