What first arose as a server outage was identified Saturday as a malware attack, which appears to have originated from outside the United States and hobbled computer systems and delayed weekend deliveries of the Los Angeles Times and other newspapers across the country.
Technology teams worked feverishly to quarantine the computer virus, but it spread through Tribune Publishing’s network and reinfected systems crucial to the news production and printing process. Multiple newspapers around the country were affected because they share a production platform.
The attack delayed distribution of Saturday editions of the Los Angeles Times and San Diego Union Tribune. It also stymied distribution of the West Coast editions of the Wall Street Journal and New York Times, which are printed at the Los Angeles Times’ Olympic printing plant in downtown Los Angeles.
By Saturday afternoon, the company suspected the cyberattack originated from outside the United States, but officials said it was too soon to say whether it was carried out by a foreign state or some other entity, said a source with knowledge of the situation.