A cyber attack that further threatens by encrypting the data stored on a company's personal computer, requesting a ransom in exchange for its release, and disclosing the stolen data if payment is refused.

Recently, it has become clear that Japanese companies have been attacked and confidential information has been disclosed one after another, and the National Cyber ​​Security Center is calling attention.

In this cyber attack, a ransomware virus that requires a ransom is used, and when infected, the data stored in a computer or the like is encrypted and becomes unusable, and a ransom is required in exchange for its cancellation.



Recently, when the request for ransom is refused, if the data stolen in advance is released, the method of "double intimidation" that threatens further is used, and the damage is occurring one after another in Japan.



In April, an overseas group company of Kashima Construction Co., Ltd., a major general contractor, was attacked, and in addition to confidentiality agreements with the operating companies of major theme parks, emails and a list of business partners were highly anonymous. In addition to being released on the site = dark web, it was revealed that an American subsidiary of HOYA, a major optical equipment company that handles contact lenses, was attacked and documents containing data on the eyesight of customers were released. I did.



Also, in November of last year, the major game software company "Capcom" was attacked and personal information of more than 15,000 people including employees was leaked. In January, the Yamagata Chamber of Commerce and Industry Association announced. It has also been revealed that information such as the staff's address, career, and salary was disclosed after the attack.



Inadequate security in the remote work environment maintained by Corona, and cases where overseas branch offices and subsidiaries, which tend to have insufficient countermeasures, are targeted and attacked are conspicuous, and the Cabinet Cyber ​​Security Center is calling attention. I will.