Malicious NuGet Localhost C2 Proxy

Ethan Andrews@eandrews

•updated Feb 23, 2026•3•0•27

Detects network traffic to a local proxy on port 7152, a behavior associated with a malicious NuGet package campaign involving NCryptYo, DOMOAuth2_, IRAOAuth2.0, and SimpleWriter_. This traffic is characterized by communication to a loopback address (127.0.0.1 or ::1) or 'localhost' on the suspicious port, specifically targeting '/api/auth/' endpoints.