The most common and probably the most costly form of cyber-attack aims to spy. An unarmed intrusion is politically less explosive than an armed one. Stuxnet is an intelligent weapon without learning capabilities, maybe this features will be part of next generation of cyber weapons. The choice of cyber weapon allows those who use such strategies to remain anonymous until military. The main strategies that use such malware are mainly aimed at the enemy are aimed at technological capabilities of an agent that can infect enemy structures. The use of viruses and other malware to attack critical infrastructure is symptomatic.”]
Source: https://securityaffairs.co/wordpress/3896/intelligence/cyber-weapons.html