Kyodo News revealed that Japan will develop its first-ever computer virus as a defense measure against cyber attacks. The Defense Ministry plans to use the malware as a vaccine that could neutralize the other malicious codes. The virus will be developed by private companies and will not be used for pre-emptive attack or active defense. The use of malware for defense purposes is in the middle of a heated debate. The cyberspace has no boundaries and the risk that malicious code will go out of control, threatening the sovereignty of foreign states, is concrete.”]
Source: https://securityaffairs.co/wordpress/84943/breaking-news/japan-malware-defense.html