Python Process Loading snap7.dll/python-snap7 on Engineering Workstation

Emiliano Mema@Nosalva

•updated Aug 28, 2026•3•0•24

Detects instances where a Python interpreter (python.exe or pythonw.exe) loads the 'snap7.dll' library. This library is commonly associated with the 'python-snap7' package, used for communicating with Siemens S7 PLC devices. This behavior is potentially suspicious in OT environments where Python should not be interacting with industrial control system hardware.