GMO tells customers to disconnect PCs after breach and ransomware threat
Original title: Japanese internet giant GMO tells customers to shut down and disconnect PCs from the internet following data breach and ransomware threat
The company said up to 26,739 servers were at risk after malware was found on some customer environments.
GMO Group told customers to scan computers for viruses, back up data, disconnect devices from the internet, and shut them down, including unplugging cords. On October 20, 2026, the company disclosed a cyberattack in which attackers installed malware on some customer environments and later made threats. GMO has been progressively shutting down affected servers, investigating, and cleaning them.
Unconfirmed: The second-hand report describes a ransomware threat and the server figure as apparent, without confirming encryption or data theft.
- The notice told customers to unplug any cords connected to their PCs.
- Up to 26,739 servers were described as at risk.
- GMO said it is shutting servers down and cleaning affected systems.
Impact: Malware on some customer environments and a ransomware threat
- 1.Scan PCs for viruses and back up data
- 2.Disconnect computers from the internet and shut them down
From the original article
2 min read at databreaches.netSead Fadilpašić reports: Japanese internet giant GMO Group has told its customers to scan their computers for viruses, back up all of their data, disconnect the devices from the internet and then shut them down. The announcement, which literally told customers, “unplug any cords connected to your PC,” was made in response to a cyberattack...
By Dissent · databreaches.net
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