WannaCry is bad. But it’s probably just a hint of what’s coming. Researchers have been warning about the potential for a large-scale ransomware worm like this for some time, and while WannaCry has caused some trouble, it could be a lot worse. A ransomware worm that targets IoT or ICS systems would have the potential to truly wreak havoc on a massive scale. Imagine traffic lights or autonomous cars being held for ransom. It’s not a pretty picture but it probably isn’t too far off in the future either.