Multi-Stage Mustang Panda PlugX Infection Indicators Detected

This rule detects indicators of a multi-stage infection involving PlugX malware, often associated with the Mustang Panda threat group. It correlates process execution events where the command line contains "mustang", "panda", or "plugx" with either registry modifications containing the same keywords or network connections to a remote URL containing "/update". This correlation helps to identify more sophisticated attacks that involve multiple stages of execution, persistence, and communication.