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MediumSigmaHQ Florian Roth (Nextron Systems) +3

New Port Forwarding Rule Added Via Netsh.EXE

Detects the execution of netsh commands that configure a new port forwarding (PortProxy) rule

Detection logic

Detection requirements

Platform: ESXi Linux macOS Network Devices Windows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
Log source product: windows
Log source category: process_creation

Known benign triggers

Legitimate administration activity
WSL2 network bridge PowerShell script used for WSL/Kubernetes/Docker (e.g. https://github.com/microsoft/WSL/issues/4150#issuecomment-504209723)

References

Links the source published beside this detection. Reference is the link the source wrote, unmodified. Class is decided by this catalogue from the host and path, not stated by the source. Cited by counts published detections citing the same resource, including this one, and the sources beneath it count the repositories this catalogue ingests, which is not the same as independent research.
Reference	Class	Cited by
adepts.of0x.cc/netsh-portproxy-code/	Unclassified	2
www.dfirnotes.net/portproxy_detection/	Unclassified	2
www.fireeye.com/blog/threat-research/2019/01/bypassing-network-restrictions-through-rdp-tunneling.html	Threat report	4

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