responsible for this attack and why they did it is information we don't have. very few details have been shared about where this attack came from and the motive behind it. in situations like this, it's very difficult to determine where an attack like this could originate from. the san diego union tribune is reporting that the intention of the attack is believed to have been to disable infrastructure, particularly servers, as opposed to trying to steal information. so if that was, in fact, the intent of the attack, the hackers were very successful. now, tribune publishing says this malware was detected in their servers on friday. that means any newspaper using tribune software was impacted. there were printing problems. at "the baltimore sun," for example, the puzzles and comics were not included in saturday's paper. for "the san diego union tribune," the impact was much more dramatic. they say it was one of the greatest disruptions they've ever experienced in publishing.