Microsoft took down the fake domain and worked with the federal government to block the phishing messages. Burt said that none of the targeted campaign staffers were infected.
Burt did not specify whether the hacking attempts originated from Russia.
Threat intelligence researchers at Microsoft and elsewhere are “not seeing the same level of activity by the Russian activity groups leading into the midterm elections that we could see when we look back at the 2016 elections,” Burt said.
For example, he said, Russian hackers are not targeting think tanks and academic experts like they did during the 2016 campaign.