Members of the Texas National Guard at a U.S. Army Reserve Training Center in Elwood, Ill., a suburb of Chicago, in October.Credit...Jamie Kelter Davis for The New York Times National Guard: President ...

The threat actor behind two malicious browser extension campaigns, ShadyPanda and GhostPoster, has been attributed to a third attack campaign codenamed DarkSpectre that has impacted 2.2 million users ...