Investigation links North Korea-linked hackers to massive GMO Internet data leak in Japan

Summary

An analysis by Japan's GMO Internet Group found that a North Korea-linked hacking group was likely behind the cyberattack on the company last month, according to sources close to the matter, who cited characteristics of the malware used and other traces left by the perpetrators. The company appears to have already reported the matter to the government and will now focus on determining the full circumstances.

Timeline

1. South China Morning Post

   2 Nov 2026, 00:58 UTCSource ↗

   Reports that an analysis by GMO Internet Group found a North Korea-linked hacking group was likely behind the cyberattack on the company last month, citing sources close to the matter, malware characteristics and other traces left by the perpetrators.