What is a Webshell? Cybersecurity Guide

A webshell is a type of malicious software that is injected by cyber attackers into files on a compromised website or server. It typically exists in the form of a script language (such as PHP or ASP), allowing attackers to perform various operations on the infected system, including file management, database access, and remote command execution.

Webshells can be utilized to control infected systems, carry out illegal operations such as accessing sensitive information, spreading malicious software, and launching network attacks. Attackers can interact with infected systems through a Webshell and use its access to further infiltrate systems and spread to other network resources.

Detecting and removing Webshells is crucial for protecting the security of websites and servers. Common defense measures include regularly updating and managing system software, strengthening access control, auditing files and logs, and using secure password policies.