OYO Corporation: some servers of its Land Information Report service were attacked with ransomware, partly halting the service

A customer reported on September 30 that the service was unusable; the servers were stopped and the cause was found to be a ransomware attack.

Disclosed

2021-10-07

Organizations involved

Leaked or at risk

Unknown

Downtime

Unknown

What happened

2021-09-30
A customer reported that the service could not be used. The related servers were stopped and the cause investigated, and it turned out to be a ransomware attack. [1]
2021-10-07
It announced the case. [1]
2021-11-18
It published a follow-up and said the cause was unauthorized access through a port that had not been closed. [2]

The cause was unauthorized access through a port that had not been closed. [2]

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						Note
OYO Corporation	[Breached]	[Moderate]	Tokyo, Chiyoda	Accommodation, food and drink	Unknown