Critical

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

BleepingComputer

October 27, 2026 at 11:35 PM

Actively Exploited

Overview

The GMO Group, a prominent Japanese internet services provider, has issued a warning to its customers to disconnect their systems from the internet and shut down their computers. This precaution follows a breach in the company's Onamae Desktop Cloud, where a threat actor has threatened to initiate a ransomware attack. This incident raises concerns for users of the Onamae service, as ransomware can lead to significant data loss and operational disruptions. The company is urging immediate action to protect sensitive information and prevent potential data breaches. Customers should take these warnings seriously to minimize the risk of falling victim to the attack.

Key Takeaways

Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
Affected Systems: Onamae Desktop Cloud users
Action Required: Disconnect systems from the internet and shut down computers.
Timeline: Ongoing since [current date]

Original Article Summary

The GMO Group has urged customers to disconnect their systems from the internet and shut down computers after a threat actor who breached the company's Onamae Desktop Cloud threatened to launch a ransomware attack today. [...]

Impact

Onamae Desktop Cloud users

Exploitation Status

This vulnerability is confirmed to be actively exploited by attackers in real-world attacks. Organizations should prioritize patching or implementing workarounds immediately.

Timeline

Ongoing since [current date]

Remediation

Disconnect systems from the internet and shut down computers

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Ransomware, Data Breach.

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