For details, see Network of Social Media Accounts Impersonates U.S. Political Candidates, Leverages U.S. and Israeli Media in Support of Iranian Interests | FireEye
"Facebook and Twitter each said on Tuesday they had disabled a sprawling disinformation campaign that appeared to originate in Iran, including two accounts on Twitter that mimicked Republican congressional candidates and may have sought to push pro-Iranian political messages.Facebook and Twitter disable new disinformation campaign with ties to Iran | Washington Post
Some of the disabled accounts appeared to target their propaganda at specific journalists, policymakers, dissidents and other influential U.S. figures online. Those tactics left experts fearful that it could mark a new escalation in social-media warfare, with malicious actors stealing real-world identities to spread disinformation beyond the web."