It seems that The Bad Guys (for some value of Bad Guys) are now carefully choosing their targets, and are also carefully choosing personnel who work at those targets and are e-mailing trojan horses, in the form of MS Office documents to those people in the hope that they'll open the bad files and run the exploits. The nature of the payload isn't clear in the article - it sounds like the trojans open connections to systems that the attackers control, and the attackers tunnel back through into the target networks. The scary thing is that the targets include various federal …