What is Backdoor?

A backdoor refers to any method that can circumnavigate regular authentication and authorization procedures to gain root or high-level access to a system, computer, application, or network. Backdoors are commonly installed through remote file inclusion (RFI), which identifies a weak component in an application or a network. This type of channel allows direct control over an infected device to manipulate data, deploy more malware, or create a zombie network of infected computers for criminal activity.