I guess it is a given these days to know that one ought not to simply open up any attachments in the email, as you can never quite tell whether there is some malicious code behind that file or not. For those who prefer to throw caution to the wind, it is bad enough that your computer gets infected with a virus or malware, but the situation just got a whole lot worse when you discover that your computer is connected to the rest of the corporation's network, resulting in a potential security compromise on a far larger scale.
Ubergizmo , Shamoon malware allegedly deals death blow to infected computers, Shamoon malware allegedly deals death blow to infected computers