GMO Internet Group will give customers whose PCs were hit by ransomware a new machine of equivalent performance, the company announced by noon on October 27, following unauthorized access to its Onamae.com Desktop Cloud service.
GMO said that as of 11:59 a.m. on October 27 it had found no malware, including ransomware, on any of the devices it had taken in from customers and finished analyzing.
The group behind the attack published what it said was the personal information of one customer on its own site at noon the same day. GMO said it is still checking the material and that it may contain content that differs from the facts. The company urged people not to visit the group's site or spread what it posted.
What the attackers threatened
The group, which claimed responsibility for the breach, said on its website that it exploited a vulnerability in Onamae.com Desktop Cloud to get into customers' local PCs. It had warned that if GMO did not pay by noon on October 27, it would release customer information and attack customer PCs with ransomware, encrypting their data.
GMO has said its employees are traveling around the country to collect customers' devices, and that its white-hat hacker team is investigating and analyzing them.
How to claim a replacement
Customers whose PCs were affected by ransomware can contact GMO's inquiry desk. The company will confirm the state of the damage and then provide a new PC.
GMO also said security firms including Trend Micro and AI companies have offered to help with its response, and that it is checking and coordinating what that support will involve.