C99 Shell Php 7 Version

Description and Details

C99Shell-PHP7

C99Shell-PHP7 is an updated PHP 7-compatible edition of the well-known C99 web shell, featuring compatibility improvements and a safer build configuration.

Version: c99shell.php v2.0 (PHP 7)
Release Date: February 25, 2019
Updated By: KaizenLouie

About C99Shell

C99Shell is a well-known PHP-based web shell historically associated with compromised web applications and unauthorized server access. It provides a web-based interface for interacting with a server through the privileges of the web server process.

Historically, C99Shell has been associated with capabilities such as filesystem browsing, file inspection, file modification, uploads, and permission management. These characteristics make it a useful reference when investigating web server compromises and identifying potentially malicious files.

Several C99Shell variants have circulated over the years, each with different implementations and modifications. This PHP 7 release represents one such variant and provides useful reference material for security researchers studying web shell behavior.

Security Research

C99Shell variants contain recognizable patterns and behavioral indicators that can help security professionals develop detection rules, improve malware analysis workflows, and strengthen defensive mechanisms against unauthorized web shell deployments.