Backdoors – A Dangerous Back Entrance

So what are Backdoors? Why is that considered A Dangerous Back Entrance?

Let’s find out…


Also known as “Private Entrance” or a Trapdoor –

A Backdoor is a security breach that allows access to confidential, hidden information without the need for Authentication. That, will violate the AAA model so Confidentiality will not exist and already here one of the most important principles in information security – Is Broken.

Backdoors are hacking tools planted on a certain device that allows access and control over the device, up to a certain level. Of course, it is important to note that since it is malicious, it is probably hidden and difficult to locate.

What is the origin of the nickname Backdoor?

Originally, these “Programs” were created as an undocumented entry to the software (code snippet) written by programmers to assist in maintenance or testing. In short? These Doors should be a Secret.

In short? These Doors should be a Secret.

A backdoor can take many “forms”, such as a hidden account with administrative privileges, a secret network port that allows remote access. And in some cases, a malicious code inserted into a legitimate program. Once a backdoor is in place, an attacker can use it to gain access to the system or network at any time without being detected.


Types of Backdoors –

There are 3 “main” types of these Malwares. Each type is related to its functionality :

  1. Active – creates a “connection” from the host computer (on which the door is installed) to another computer and enables complete control over it. It can also be used to transfer information from it to other computers.
  2. Passive – opens a port on the host computer and allows connection to it for the purpose of taking over or stealing information.
  3. Backdoors resulting from Bugs which allows attackers to gain elevated privileges by exploiting security holes in the attacked software. By using such breaches, the attacker can run code with system administrator privileges. For example, by using a buffer overflow or a bypass of the security layer in the software.

Here’s a few examples of Backdoors :

  1. Command and Control (C&C) – This type of backdoor allows an attacker to control a system remotely by creating a connection to a command-and-control server.
  2. Web – This type of backdoor is created by attackers to exploit vulnerabilities in web applications, allowing them to bypass security controls and gain access to the system.
  3. Rootkit Backdoor – This time, it installs a rootkit on the system, allowing the attacker to hide their presence and evade detection by security software.
  4. Reverse Shell – This type creates a connection between the attacker and the compromised system, allowing the attacker to execute commands and control the system remotely.
  5. Ransomware – This type of backdoor is used by ransomware attackers to gain access to a system and encrypt the data, then demand a ransom to decrypt the data.
  6. Hardware – This type is installed in the hardware of a system or device, allowing an attacker to gain access to the system or device even if the software is reinstalled.
  7. Application-Level – This time, this type is created by exploiting vulnerabilities in applications running on the system, allowing the attacker to gain access to the system.


How can we Prevent this?

The first step we recommend is to make sure that there are no Breaches or Vulnerabilities in your security systems. For example, if your website is linked to a certain device or a database, you can scan for vulnerabilities using Kayran! Kayran’s Web Application Vulnerability Scanner could help you find and plug these “holes” effortlessly!

Be sure to lock your Doors. Choose Kayran.

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