Trojan detection and removal

Internet has became the essential part of the Lifestyle. Internet is so diversified and helpful that doing work without internet seems impossible. But with so much use there is also the Risk, examples of risk are Trojan, viruses, worms , etc. 
In this article we will concentrate on the Trojan.





What is Trojan ?

The name Trojan horse has a bit history behind, many years back, during the wars Greeks constructed a giant wooden horses and hide few soldier in it and acted as if they were Greek sailors came to sail across the city of Troy, the citizens of troy called Trojans fought with the sailors and pulled that giant horse, as a trophy inside the walls of their city. In the night the soldier came out of the horse and opened the gate of Troy for other soldiers , Greek army entered the city and finished the war.
A Trojan or Trojan Horse, is a malicious program which overall look as legitimate but in reality its somethings else. Basically, its few lines of code embedded in the program which acts in definite way, as programmed by the attacker or hacker.
For example, hacker can have unauthorized access using the specific Trojan. Trojan do not replicate like worms, and Trojans do not inject themselves into other file.
This malicious program can be  downloaded and installed on your computer as some legitimate program.
There are different types of Trojan:

• Common Shell Trojan
• GUI Trojan
• Document Trojan
• Email trojan
• Defacement Trojans, etc

 How to Detect and identify Trojan ?

Today, so many types of Trojan are there that it has became impossible to find all by using same tool or you can say anti-virus. Some of the observation can be made if Trojans are possibly present in your computer.

1. Your system get very slow, even when only few programs are running.
2. There are unexpected pop window.
3. Change, i.e. there may be slight change in background colour.
4. Your mouse pointer dissapears.
5. Your password is changed by some authorized person.
6. Your Start button dissapears.
7. Automatically your antivirus get disabled.
8. Your CDROM pop out sometimes.
9. Involuntary some music starts, etc.

Best way will be, run some antivirus programs because your computer may be working properly but Trojans can be present in it. And remember try different antivirus to get fully sure because each antivirus has different set of database to scan.



How to remove Trojan ?

1. Scan the computer with your antivirus, generally all the antivirus show the result of scanning and ask for the action to take , example delete, ignore, etc. Select the desired option.

2. Some Trojans are there which will not let you delete themselves using some programs, then try deleting manually those programs. For that scan the computer with the antivirus, check the report and note down the name and location of the trojan, try manually deleting.

3. Formatting hard-drive is always a better option to ensure that all the virus, trojans, worms are completely removed from the computer, because your personal information are present on the hard-drive and leaving trojans on the hard-drive is not a good idea because some trojans are specially designed to steal your personal information.





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