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Japan internet giant GMO says hackers posted stolen customer data

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Japan internet giant GMO says hackers posted stolen customer data

Japanese internet company GMO Internet is investigating a data leak after suspected unauthorized access to its Onamae cloud desktop service, which provides virtualized desktops to financial traders

The IT and internet services giant said on its blog that it believes the attacker has published information allegedly linked to customers and its business. However, the contents are still being verified and the full extent of the incident remains unclear.

GMO Internet has since advised customers to reset their passwords, amid receiving reports of “unauthorized operations” performed on customer trading accounts. The company said 27,000 servers may be affected by the breach.

A spokesperson for GMO Internet did not respond to TechCrunch’s request for comment.

The incident comes about a week after the Japanese firm’s cybersecurity unit separately reported finding evidence that a Chinese AI-enabled penetration testing tool called Artex had been used in hacks targeting companies across Japan. However, the company said it has not publicly established a connection between Artex and the breach of Onamae.

The Artex tool was also used to hack financial institutions in South Korea in September, according to a report by CrowdStrike earlier this month. The attacks largely relied on exploiting weak security controls, such as a lack of multi-factor authentication. Artex’s Chinese developer has since stopped public updates and made the AI security tool closed-source after it was linked to cyberattacks targeting banks, per Reuters.

A spokesperson at Japan’s Financial Service Agency (FSA) told TechCrunch that it issued guidance in May urging financial institutions to prepare for a rise in cybersecurity vulnerabilities.


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