This analytic rule is designed to detect attempts to exploit a remote code execution vulnerability specific to Juniper Networks devices, particularly through the exploitation of the /webauth_operation.php endpoint with specific query parameters. By monitoring HTTP requests that target this endpoint, especially those returning a status code of 200, the rule seeks to identify unauthorized attempts to upload and execute PHP scripts on the affected devices, which could lead to significant security breaches, including data compromise and unauthorized control over the devices. The rule is implemented using the Suricata engine in conjunction with the predefined Web data model in Splunk to accurately track and respond to these malicious activities. Analysts should be cautious of false positives stemming from legitimate uses of the endpoint and review HTTP request contents diligently to ascertain malicious intent.