North Korean hackers also target the US pharmaceutical giant Pfizer.
South Korean intelligence officers have said this to a parliamentary committee in Seoul, South Korean news agency Yonhap reported.
The hackers tried to break into servers to learn more about the production of the vaccines at Pfizer.
It is not the first time that reports have surfaced about the great interest of North Korean hackers in pharmaceutical companies involved in making corona vaccines.
For example, late last year, Microsoft reported that North Koreans had attacked seven major pharmaceutical companies in Canada, France, India, the US and South Korea.