This advisory, put out by a conglomerate of government agencies, exposes one critical theme: advanced malware is constantly changing and therefore difficult to prevent. Today’s malware is designed using modern software development practices, meaning they encapsulate services and apply a “brick in, brick out” mentality. This makes the malware easy to adjust and work around signatures, which are sequences of behaviors a defensive product marks as malicious. However, an attacker can simply adjust a behavior to break the signature. This cat-and-mouse game makes defense hard, so gaining visibility on the efficacy of common attacks should be your first priority.