Microsoft said on Tuesday that hackers operating in China exploited a zero-day vulnerability in a SolarWinds product. According to Microsoft, the hackers were, in all likelihood, targeting software companies and the US Defense industry.
SolarWinds disclosed the zero-day on Monday after receiving notification from Microsoft that it had discovered that a previously unknown vulnerability in the SolarWinds Serv-U product line was under active exploit. Austin, Texas-based SolarWinds provided no details about the threat actor behind the attacks or how their attack worked.
Commercial VPNs and compromised consumer routers
On Tuesday, Microsoft said it was designating the hacking group for now as “DEV-0322.” “DEV” refers to a “development group” under study prior to when Microsoft researchers have a high confidence about the origin or identity of the actor behind an operation. The company said that the attackers are physically located in China and often rely on botnets made up of routers or other types of IoT devices.