GitHub Authentication Token Access via Node.js

This rule detects when the Node.js runtime spawns a shell to execute the GitHub CLI (gh) command to retrieve a GitHub authentication token. The GitHub CLI is a command-line tool that allows users to interact with GitHub from the terminal. The "gh auth token" command is used to retrieve an authentication token for GitHub, which can be used to authenticate API requests and perform actions on behalf of the user. Adversaries may use this technique to access GitHub repositories and potentially exfiltrate sensitive information or perform malicious actions. This activity was observed in the wild as part of the Shai-Hulud worm.