After being extricated from the network, Dark Halo then returned a second time, exploiting a vulnerability in the organization's Microsoft Exchange Control Panel. Near the end of this incident, Volexity observed the threat actor using a novel technique to bypass Duo multi-factor authentication (MFA) to access the mailbox of a user via the organization's Outlook Web App (OWA) service. Finally, in a third incident, Dark Halo breached the organization by way of its SolarWinds Orion software in June and July 2020