The tag "Late Night Show" because, the attack origins at the end of 2018 and apparently the Show is very late.
The group, also known as FancyBear, Sofacy Group, Sednit..., starts its activity in the mid-2000s. They target government, military and security organizations especially NATO-aligned states.
APT28 is a threat group that has been attributed to Russia's Main Intelligence Directorate of the Russian General Staff by a July 2018 U.S. Department of Justice indictment. This group reportedly compromised the Hillary Clinton campaign, the Democratic National Committee, and the Democratic Congressional Campaign Committee in 2016 in an attempt to interfere with the U.S. presidential election.