Japanese internet company GMO Internet is investigating a data leak after unauthorized access to its Onamae cloud desktop service.

The incident, which may impact up to 27,000 servers, prompted a service shutdown, password resets, and ongoing verification of allegedly published customer and business data.

The company said that unknown individuals gained unauthorized access to its systems and published information allegedly related to customers and its business, but its content is still being verified. There have also been reports of unauthorized actions on trading accounts, and the company estimates that up to 27.000 server computers may be affected.

The chronicle of the attack and the ransom

The case began on October 21, when GMO Internet suspended the service after detecting illegal access.…