Recognizing a Possible PHP Web Shell in an Evolution CMS Project

When a PHP file looks wrong enough to make you ask whether it is a web shell, the situation is already serious. The exact family name matters less than the operational response: treat it as a possible compromise until proven otherwise.

The safe path is to isolate the file, inspect surrounding writable directories, compare the project against a known-good copy, rotate credentials, and review how the code may have landed on the server in the first place. Deleting one suspicious file without doing the surrounding cleanup is often how reinfections happen.

This is a strong Best Practices topic because compromised Evolution CMS sites often show the same pattern: a suspicious PHP payload is only the visible symptom of a wider breach.