Free online WebShell detection tool SHELLPUB Professional detection of website backdoor Trojans

In today's digital age, website security has become a key issue that every enterprise and individual webmaster must pay attention to. As network attack methods become increasingly complex, WebShell (web backdoor) as a common hacker attack tool is seriously threatening the safe operation of websites. This article will deeply explore the harmfulness of WebShell, the current status of detection technology development, and focus on the core advantages and usage of the professional WebShell detection and killing platform SHELLPUB.

1. Threats and hazards of WebShell

WebShell is a backdoor program that exists in the form of a web page. Hackers can gain control of the website server by uploading these malicious scripts through website vulnerabilities. Common WebShells support multiple scripting languages ​​such as ASP, ASPX, PHP, and JSP, and have the following typical hazards:

• Data theft : Attackers can obtain sensitive information in the database, including user accounts, passwords, transaction records, etc.
• Website tampering : illegally modifying web page content, inserting malicious jump codes or illegal content such as gambling, pornography, etc.
• Server compromise : used as a springboard to attack other servers in the intranet and form a botnet
• Persistence : Even if the vulnerability is fixed, attackers can still continue to control the server through the backdoor

2. Limitations of Traditional Detection Technology

Traditional WebShell detection mainly relies on the following methods, but they all have obvious defects:

1. Signature matching

Compare with known malicious code features, but cannot detect new variants and anti-virus WebShell

2. Static Analysis

Check static features such as file hash values ​​and suspicious function calls, with a high false positive rate

3. Dynamic behavior analysis

Monitors system calls during script execution, but requires running malicious code, which poses a security risk

3. Shellpub’s multi-dimensional detection technology

As a professional WebShell detection and killing platform, SHELLPUB innovatively adopts a multi-engine collaborative detection mechanism:

1. Deep feature detection

A refined feature system based on a massive sample library can identify tens of thousands of known WebShell variants

2. Machine Learning Model

Analyze the semantic features of the code through NLP technology to effectively detect new types of obfuscated and encrypted WebShells

3. Behavioral Sandbox

Simulate the execution of suspicious code in an isolated environment to capture hidden malicious behavior characteristics

4. Big Data in the Cloud

Synchronize the latest global threat intelligence in real time to defend against 0day attacks in the first place

4. SHELLPUB Usage Guide

1. Online detection

Visit the official website https://n.shellpub.com, package the website files into a ZIP format (no more than 10MB) and upload it

2. Client Tools

Supports Windows and Linux systems, suitable for large-scale server environments:

• Windows version: Graphical operation interface, support for scheduled scanning
• Linux version: command line tool that can be integrated into automated operation and maintenance processes

3. API interface

Provide RESTful API for enterprise users to integrate into CI/CD process to achieve automated security testing

5. Best security practice recommendations

1. Regularly use SHELLPUB to scan the entire site, it is recommended to do so at least once a month
2. Focus on high-risk locations such as upload directories and template directories
3. After discovering WebShell, it should be isolated immediately and the intrusion path should be traced back
4. Cooperate with WAF, log audit, etc. to build a defense-in-depth system

By adopting professional detection tools such as SHELLPUB and combining them with standardized security operation and maintenance processes, website administrators can significantly improve their defense capabilities against WebShell threats and lay a solid security foundation for business development.