SEOUL—North Korean hackers have targeted at least six pharmaceutical companies in the U.S., the U.K. and South Korea working on Covid-19 treatments, according to people familiar with the matter, as Pyongyang seeks sensitive information it could sell or weaponize.
The firms include previously unreported targets in the U.S.: Johnson & Johnson and Maryland-based Novavax Inc., which are both working on experimental vaccines, the people said. The list also includes three South Korean companies with Covid-19 drugs in earlier clinical…
