Threat actors behind the SolarWinds supply chain attack leveraged a malware named Raindrop for lateral movement and deploying additional payloads. Raindrop (Backdoor.Raindrop) is a loader that was used by attackers to deliver a Cobalt Strike payload. The malware is similar to the Teardrop tool, but while the latter was delivered by the initial Sunburst backdoor, the former was used for spreading across the victims network. The report published by Symantec includes IoCs and Yara Rules.”]
Source: https://securityaffairs.co/wordpress/113620/hacking/raindrop-solarwinds-attacks.html