Japan's GMO urges customers to shut down PCs amid ransomware threat

Japan's GMO Group has issued an urgent warning to customers to disconnect their systems from the internet and shut down their computers. A threat actor who breached GMO's Onamae Desktop Cloud service has threatened to launch a ransomware attack. The company is taking a proactive defensive stance by advising customers to power down PCs to prevent potential ransomware deployment. The incident highlights the risks associated with cloud-hosted desktop services. GMO Group operates one of Japan's largest internet services, making this a significant incident affecting a broad customer base. The threat appears imminent as the attacker set a specific date for the ransomware launch.