Yeah, most worms like this have detective capability to work out whether they’re on the systems that they’re wanting to be on. If not, they’ll either try to cle

Yeah, most worms like this have detective capability to work out whether they’re on the systems that they’re wanting to be on. If not, they’ll either try to clean up and vanish or just serve for further propagation. Stuxnet was discovered because it accidentally spread too far, and ended up on a malware analysts desk. There was a targeted supplier, an upstream vendor as the insertion point, but it spread outside of that chain.