Bg.zip

Because the server likely has an vulnerability or allows the use of PHP wrappers, you can call the file inside the archive without extracting it manually.

Determine if the server executes files based on their extension or if it filters specific dangerous strings. BG.zip

The server executes the command whoami , confirming Remote Code Execution. Alternative Interpretations Because the server likely has an vulnerability or

A web application that allows users to upload files and automatically compresses them into a .zip archive. BG.zip

Access the webshell using the zip:// wrapper: http://target.com .

If you are looking for a different "BG.zip," please clarify if it refers to:

Insecure handling of file uploads and the use of the zip:// wrapper, which can lead to Remote Code Execution (RCE) . Step 1: Enumeration