When CrowdStrike researchers later reproduced the attack , events were present in CozyDuke - also known as CozyBear , CozyCar and Office Monkeys ( among others ) , and whose activity appears to align with advanced persistent threat APT29 - is a threat actor which came to prominence in 2014 when it is believed to have staged a series of precise attacks on high profile targets including the US White House , Department of State and the Democratic National Committee .