Andrzej Dereszowski, a security consultant, has demonstrated that it’s possible to reverse engineer some malware used in targeted attacks against a company or organization and then use that information to fight back.  


And here I was putting together a protocol for our company that involved helicopters, commandos, and nuking from orbit.  Guess his method would be effective, but not much more legal.  Although finding, fixing, defenestrating, and putting their heads on pikes to be hung from an overpass in their hometowns would be more gratifying on a gut level.