MediumSigmaHQ Kamran Saifullah

Network Connection Initiated To DevTunnels Domain

Detects network connections to Devtunnels domains initiated by a process on a system. Attackers can abuse that feature to establish a reverse shell or persistence on a machine.

Detection logic

Detection requirements

Platform: ESXi Linux macOS Windows
The rule states no platform. This is derived from the 2 ATT&CK techniques it maps to.
Log source product: windows
Log source category: network_connection

Known benign triggers

Legitimate use of Devtunnels will also trigger this.

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
blueteamops.medium.com/detecting-dev-tunnels-16f0994dc3e2	Unclassified	4from 2 sources
cydefops.com/devtunnels-unleashed	Unclassified	2
learn.microsoft.com/en-us/azure/developer/dev-tunnels/security	Product documentation	2

Detection rules

Network Connection Initiated To DevTunnels Domain

Detection logic

Detection requirements

Known benign triggers

MITRE ATT&CK mappings

References

From the source

Licence

Authorship

Detection rules