The Department of Homeland security’s Cybersecurity and Infrastructure Security Agency (CISA) issued a National Terrorism Advisory Bulletin on Jan. 4th, 2020. This agency only issues such warnings when there is a credible, specific and impending terrorism threat against the United States. In this case, their warning focused primarily upon cybersecurity attacks against US government and business entities in retribution for the killing of Iranian IRGC-Quds Force commander Qassem Soleimani. Iran has a history of cyber-attacks against US Businesses and government entities. Companies should be on high alert and remind employees to be especially vigilant in email phishing attacks amongst other cybersecurity best practices.