Source of Trojan
Now a days Trojan or Trojan horse is a very common term in Cyber world.But its source is way back in 1200 BC when Greek and Troy fought a battle over control of Sea and Trade.There were two bar before Greeks to take Troy.The first one was Hector,’The tamer of Horses’ and ‘Prince of Troy’ who kept Greeks at bay for 10 years.When all other heroes failed to beat Hector Achilles the leader of a group of Assesain hired by Greeks killed him using some special armour and shield.Here is a demo
http://www.youtube.com/watch?v=rmu0LMlS8Us&feature=related
But after Hector died Achilles also got killed by Paris a brother of Hector and Greeks found it almost impossible to breach ‘Wall of Troy’.Now they again used Trick and build a great wooden Horse with hollow room inside it and left it at Troy city gate.Trojan Took the Horse inside city to offer to their God.But the horse was filled with best Greek crack force who opened Gate at night and Greek army poured into the city and captured it.See it
http://www.youtube.com/watch?v=ILHecVxy_DA
Now a day Trojan Horse mean to say something looking Beautiful from outside but have some evil intention behind it.The first Trojan horse virus that we will discuss is known as the pest trap. It is also more commonly known as Spy Sheriff, and has infected millions of computers around the world. This Trojan horse virus is also classified as malware in that it does not destroy any part of your computer, but it does cause some malicious pop-ups to appear. Most of the times these pop-ups will appear as warnings stating that you need to install some type of software in an attempt to trick you into purchasing that software. Once Spy Sheriff is installed on your computer it is very difficult to remove. If you try to delete it through normal means it will simply reinstall itself from hidden infected files on your computer. Antivirus and anti-spyware software will usually not be able to detect this program. It is also impossible to remove by doing a system restore as it affects the components which operate this feature in Windows.
Sometimes these Trojan horse viruses can come in packages that are seemingly harmless. This is the case in the net bus Trojan horse which was actually software that was meant to be used to remotely control windows from another computer. Because of some problems with the software it was used to hack into several computers. One of the most notable cases was that of a professor in which thousands of child pornography pictures were downloaded to his work computer. Whenever the pictures were discovered it was assumed that he had downloaded them knowingly. Although he was eventually acquitted of the crime, the negative affects on him were long-lasting.
There are many different ways that a Trojan horse virus can infect your computer. One thing that all Trojan horse viruses have in common is that they cannot be activated unless you activate the file in which they are hidden. That is why it is so important never to open a file that you are uncomfortable with as it may open the floodgates and allow many different viruses to come in.
For some more details visit
http://www.witiger.com/ecommerce/hackers.htm
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