Package Manager Fetching from Non-Canonical Registry (Phantom Squatting)
This rule detects the execution of Python (pip) or Node.js (npm) package managers with command-line arguments specifying alternative package repositories (e.g., --index-url, --registry) that do not belong to the standard, trusted public repositories (pypi.org or npmjs.com/npmjs.org). This behavior is often indicative of supply chain attacks, where attackers attempt to trick users or automated systems into installing malicious dependencies from compromised or attacker-controlled repositories.
Microsoft Sentinel (KQL)
