What is a backdoor and how does it work?

A backdoor is a hidden entry point or vulnerability in a computer system or software that allows unauthorized access and control. It is typically created by hackers or developers for various purposes, such as gaining remote access, bypassing security measures, or conducting malicious activities.

Backdoors can be implemented through various methods, including modifying existing code, exploiting software vulnerabilities, or using social engineering techniques. Once a backdoor is installed, it can provide the attacker with privileged access to the system, allowing them to execute commands, steal sensitive information, or manipulate the system without being detected.

To work, a backdoor typically listens for incoming connections or waits for specific triggers to activate. It establishes a covert communication channel between the attacker and the compromised system, enabling the attacker to remotely control and exploit the system at will. Backdoors can be difficult to detect as they are designed to blend in with legitimate system processes or files, making them a significant security concern for organizations and individuals.