TROJAN IN BRIEF

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This tutorial will include the understanding concept of Trojan, Dangers created by Trojans, how they can come to your computer, how do they destroy you and your data. How many types of Trojans are there, how Trojans are attached behind other applications and finally the most important, Detection of Trojan on your computer and their prevention to safeguard your system and your data.

KNOWING THE TROJAN

A Trojan is a malicious program misguided as some very important application. Trojans comes on the backs of other programs and are installed on a system without the User’s knowledge. Trojans are malicious pieces of code used to install hacking software on a target system and aid the Hacker in gaining and retaining access to that system. Trojans and their counterparts are important pieces of the Hacker’s tool-kit.  Trojans is a program that appears to perform a desirable and necessary function but that, because of hidden and unauthorized code, performs functions unknown and unwanted by the user. These downloads are fake programs which seems to be a original application, it may be a software like monitoring program, system virus scanners, registry cleaners, computer system optimizers, or they may be applications like songs, pictures, screen savers, videos, etc..

 You just need to execute that software or application, you will find the application running or you might get an error, but once executed the Trojan will install itself in the system automatically.

 Once installed on a system, the program then has system-level access on the target system, where it can be destructive and insidious. They can cause data theft and loss, and system crashes or slowdowns; they can also be used as launching points for other attacks against your system.

 Many Trojans are used to manipulate files on the victim computer, manage processes, remotely run commands, intercept keystrokes, watch screen images, and restart or shut down infected hosts.

Different Types of Trojans

1. Remote Administration Trojans: There are Remote Access Trojans which are used to control the Victim’s computer remotely.

2. Data Stealing Trojans: Then there are Data Sending Trojans which compromised the data in the Victim’s computer, then find the data on the computer and send it to the attacker automatically.

3. Security Disabler Trojan: There are Security software disablers Trojans which are used to stop antivirus software  running in the Victim’s computer. In most of the cases the Trojan comes as a Remote Administration Tools which turns the Victim’s computer i nto a server which can controlled remotely. Once the Remote Access Trojan is installed in the system, the attacker can connect to that

computer and can control it.

SOME FAMOUS TROJANS:

 Beast

 Back Orifice

 Net Bus 

 Pro Rat

 Girl Friend

 Sub Seven

COMPONENTS OF TROJANS

TROJAN CONSISTS OF TWO PARTS:

1. A Client component

2. A Server component.

One which resides on the Victim’s computer is called the server part of the Trojan and the one which is on the attacker’s computer is called the client Part of the Trojan. For the Trojan to function as a backdoor, the server Component has to be installed on the Victim’s machine.