Get Permission Location of organizations that Microsoft has identified as having been exploited via second-stage attacks as part of the SolarWinds Orion supply chain attack Hackers who infiltrated government and business networks via a stealthy software update appear to have "genuinely impacted" about 50 organizations, says FireEye CEO Kevin Mandia. Speaking of the supply chain attack that implanted a backdoor in the Orion network monitoring software built by Texas-based SolarWinds, and which was pushed to 18,000 of the firm's customers, Mandia noted that, while many have been referring to it as "potentially the biggest intrusion in our history," the focus of the apparent cyberespionage campaign was much more targeted.