Russian hackers targeted South Korean regional website Rukawa.
Net, a website with the name “Rukawa” in Russian, according to the U.S. Department of Homeland Security.
The attack was aimed at “sending a malicious link that may cause a denial of service, causing an error, or to interfere with other users,” according to DHS.
Net is the largest regional website in South Korea, and is also known as “Rukawa” because it is a region of Russia.
According to the DHS, the malicious link sent to the South Korean website was a link from a domain belonging to a South Korean company called the Rokusoft, and that the website’s users could access via the Internet Explorer browser.
The attackers also redirected a number of user names, passwords, and other sensitive data, DHS said.
Rukwa’s administrators were able to recover the stolen data, and Rukowa.
Net has since been updated to remove the malicious links.
However, the attack still affected South Korean users, according an official at the South Korea Ministry of Education and Science, who requested anonymity.
The school said it is investigating the matter.
The cyberattack, which was launched in May, has affected nearly 500 million South Korean internet users, the ministry said.
South Korea is the second-largest net user in the world, after the U., according to data from NetMarketShare.
It has more than 300 million mobile users.