Define Trojan Virus & Give an Example

A Trojan Horse virus is a computer virus that is generally used to attempt to steal confidential data. It is tricky because it will embed itself among other software and will begin infecting files when it is executed.

How Trojans Get In

Trojan viruses are most likely to gain entry into a computer by way of an email attachment. When a user opens an attachment it executes the code, allowing it to install. Another way is through various messengers that create connections between computers.

What It Does

When the code is executed the virus goes to work infecting file after file. The virus designer will ultimately gain control over the computer and will be able to access all available files. An infected computer will begin to operate slowly and will exhibit pop-ups from time to time. Eventually the computer will cease to operate, or crash.

How to Prevent Trojans

Antivirus software is a good way to protect your computer from Trojan Horse and other types of viruses. Regular updates to this software are the key to preventing viruses. It is also good practice to delete emails from unknown sources without opening them.

What Happens if You're Infected

Once a computer is infected, the virus is extremely difficult to eradicate. The best protection is prevention.

I Love You Virus

One well-known Trojan virus was the "I Love You" virus that infected millions of computers worldwide. The virus exploited users through a Visual Basic script that was attached to an email. This virus infected computers in the United States, Asia and Europe forcing businesses to completely shut down email servers.

References

• Tech FAQ