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GMO Internet takes down hacker site following customer data breach

Japanese internet services provider GMO Internet has confirmed that a website used to distribute allegedly stolen customer data has been taken offline. The breach followed the company's non-compliance with a ransom demand from cybercriminals.

LSN Singapore · 28 October 2026

GMO Internet takes down hacker site following customer data breach

GMO Internet, one of Japan's largest web hosting and internet services companies, confirmed the removal of a site containing customer information after falling victim to a cyberattack. The incident occurred after the company declined to meet extortion demands from hackers threatening to publicize sensitive customer records.

The breach exposed customer data held by GMO Internet, raising concerns about the security practices of the major service provider. Cybercriminals typically operate extortion schemes by threatening to release or sell compromised data when ransom demands are not met within specified timeframes.

GMO Internet did not immediately disclose the full scope of the breach or provide details on the number of affected customers. The company has not released specific information about what categories of personal information may have been exposed or which services were compromised.

The incident highlights ongoing cybersecurity challenges faced by major technology and internet services providers in the region. Industry analysts have noted that ransom-related data breaches continue to pose significant risks to both businesses and consumers across Asia.

GMO Internet has faced previous security challenges and operates several major business units including domain registration, cloud hosting, and online payment services serving millions of users across Japan and internationally.