Strontium — a group linked to Russian military intelligence — was using the domains to target Ukrainian institutions, Microsoft said.

U.S. spy agencies have markedly improved their use of information warfare, the Senate Intelligence Committee chairman says.

The Daxin malware is "on another level," according to researchers at Symantec.

The initiative has been accused of racial bias. The new plan includes China along with other U.S. adversaries.

Symantec looks at how the spies use infected Microsoft Word attachments to implant backdoor files allowing for the delivery of more malware.

Nation-state hackers might not want to get on China's bad side, but athletes, officials, volunteers and fans should watch their phones.