Shortly before the Pyeongchang opening ceremonies on Friday, wifi at the Olympic Stadium and the official website were taken down. All systems were restored by 8AM on the following Saturday. Cisco Talos has been forthcoming with technical details of the attack, which they are dubbing Olympic Destroyer, and earlier attacks such as BadRabbit and NotPetya. The attacks are focused on destruction and disruption of equipment not exfiltration of data or other, more subtle attacks. The International Olympics Committee is refusing to comment on the source of the attacks.”]
Source: https://securityaffairs.co/wordpress/69021/hacking/pyeongchang-cyber-attack.html