Description: In a sophisticated supply-chain attack, adversaries compromised updates to the widely used SolarWinds Orion IT monitoring and management software. The digitally signed updates were posted on the SolarWinds website from March to May 2020. This backdoor is loaded by the actual SolarWinds executable before the legitimate code, as not to alert the victim that anything is amiss. Reports indicate that some of the largest companies in the world use this software, so it is still unclear if the backdoor has led to any major cyber attacks or data breaches. At least two American government agencies are also affected: the Treasury and Commerce departments. The U.S. Department of Homeland Security (DHS) and CISA issued an emergency alert calling on all U.S. federal civilian agencies to review their networks for indicators of compromise (IOCs) and advising them to disconnect SolarWinds Orion products immediately.