NicoNico has been down since June 8th, attempting to recover from a cyberattack involving ransomware.
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【追記】ニコニコサービスが利用できない状況について|ニコニコインフォ
【8/5追記】 いつもご愛顧いただきありがとうございます。ニコニコ運営チームです。 大変お待たせいたしました。 8月5日(月)15時より、新バージョン「帰ってきたニコニコ」として、「ニコニコ」サービス
Report and apology regarding cyber attacks on our services
<Dwango Press Release: Published June 14th (Friday) at 3pm>
As announced in Niconico Info dated June 8, 2024, Dwango Co., Ltd. (Headquarters: Chuo-ku, Tokyo; President and CEO: Takeshi Natsuno) has been unable to use the "Nico Nico" service operated by the company since the early morning of June 8. It has been confirmed that this outage is the result of a large-scale cyber attack, including ransomware. We have temporarily suspended use of the service and are currently investigating and responding to understand the full extent of the damage and restore operations.
After confirming the cyber attack, we immediately took emergency measures, such as shutting down the relevant servers, and set up a task force to fully investigate the damage, determine the cause, and restore the system. We would like to report the findings of our investigation to date and our future response as follows.
We sincerely apologize to our users and all concerned parties for the inconvenience and concern caused.
<Background to the response>
At around 3:30 AM on June 8th, a malfunction occurred that prevented all of our web services, including our "Nico Nico" and "N Yobikou" services, from functioning normally. After an investigation, it was confirmed that the malfunction was caused by a cyber attack, including ransomware, at around 8 AM that same day. A task force was set up on the same day, and in order to prevent the damage from spreading, we immediately cut off communications between servers in the data center provided by our group company and shut down the servers, temporarily suspending the provision of our web services. In addition, as it was discovered that the attack had also extended to our internal network, we suspended the use of some of our internal business systems and prohibited access to the internal network.
As of June 14th, we are currently assessing the extent of the damage and formulating recovery procedures, aiming for a gradual recovery.