Valiant Solutions issued the following announcement on Jan. 5.
The Wall Street Journal was one of many newspapers hit by a reported ransomware attack on the printing presses at Tribune Publishing yesterday.
A server outage at Tribune Publishing on Saturday that prevented the distribution of many leading U.S. newspapers, including the Wall Street Journal, New York Times, Los Angeles Times, Chicago Tribune and Baltimore Sun was actually nothing of the sort. Instead, it appears to have been a cyber-attack involving what is thought to have been a version of the highly successful Ryuk ransomware family. Interestingly, Ryuk is often attributed to the Lazarus Group which is thought to operate out of China but in the hands of North Korean threat actors.
Original source can be found here.
Source: Valiant Solutions