For years now, we have been continually seeing news about cyber attacks on infrastructures, and not a few dare to predict almost apocalyptic scenarios. Is the situation so bad? Are we headed to a catastrophic scenario without remedy? To try to answer these questions and reduce the level of alarmism, in this talk we will review the most notable recent incidents and analyze their possible real impact. In addition, we will analyze one of the most advanced malware discovered so far and that has been related to attacks on infrastructure related to the energy sector but that could also be used in other critical sectors. We talk about the Industroyer malware.