'; } else{ echo ''; } echo 'Hillstone Networks'; } elseif ($_SERVER[HTTP_HOST] == "update1.huaantech.com.cn") { echo ''; echo 'huaantech'; } elseif ($_SERVER[HTTP_HOST] == "update1.dcnetworks.com.cn") { echo ''; echo 'dcnetworks'; } elseif ($_SERVER[HTTP_HOST] == "update1.w-ibeda.com") { if (false===strpos($_SERVER[REQUEST_URI],"/en/")) echo ''; else echo ''; echo 'w-ibeda'; } elseif ($_SERVER[HTTP_HOST] == "update1.hp-telecom.com") { echo ''; echo 'hp-telecom'; } elseif ($_SERVER[HTTP_HOST] == "update1.maipu.com") { echo ''; echo 'Maipu'; } elseif ($_SERVER[HTTP_HOST] == "update1.ncurity.com") { echo ''; echo 'Ncurity'; } elseif ($_SERVER[HTTP_HOST] == "update1.socusnetwork.com") { echo ''; echo 'Socusnetwork'; } else{ echo ''; echo 'Hillstone Networks'; } ?>
 
   
 

RULE（RULE ID：339343）

Rule General Information
Release Date: 2025-08-05
Rule Name: Tool VShell Detection - Websocket Online
Severity:
CVE ID:
Rule Protection Details
Description: Vshell is a comprehensive red team tool designed with both stealth and flexibility in mind, making it especially suitable for simulating network attacks and testing defense systems. The tool supports a wide range of protocols, including TCP, UDP, KCP, WebSocket, DNS, DoH, and DoT. It comes with built-in tunneling and proxy capabilities, supporting both forward and reverse connection modes to adapt to complex network environments. Its core features include file management, forward/reverse connection for agent deployment, plugin execution, and tunneling proxy functionalities.This rule is used to detect VShell C2 tool Websocket Online traffic.
Impact: Attackers use attack tools to attack targets, which can lead to data leakage, service interruption, system crash, data tampering, and illegal access.
Affected OS: Windows, Linux, Others
Reference:
Solutions
1. Scan the server file system to ensure that no hacking tools and related malicious files are left. 2. Make a complete system backup to ensure the security of server data. 3. Secure the server, restrict access rights, install firewalls, and use secure access control lists.