Security experts say the virus appears to be the kind of threat they have worried about for years. The virus targets Siemens management software called Simatic WinCC, which runs on the Windows operating system. Microsoft issues a security advisory warning of the issue, saying it affects all versions of Windows. The software does not exploit a bug in the Siemens system to get onto a PC, but instead uses a previously undisclosed Windows bug to break into the system. It copies itself to any USB device it finds, but if it detects Siemens software, it does nothing.”]
Source: https://www.csoonline.com/article/2125439/new-virus-targets-industrial-secrets.html