This document discusses different types of computer viruses including Trojan horses and Salami attacks. A Trojan horse appears to perform a useful function but also steals information or harms the system. A Salami attack involves small, unnoticed amounts of money or data being siphoned off over time from accounts. The document provides definitions and examples of these virus types and recommends installing antivirus software and monitoring for errors to prevent attacks.

1. Virus Trojan Horse & Salami
Attack
Name : Rizwan Razman B. Ahmad Nozrin
I/C no : 940420-08-****
Teacher’s Name :Pn Aenizawati bt. Abdul Samad

2. Contents
• Virus
• Types Of Virus
• Trojan Horse
• Salami Attack
• Conclusion
• Sources Of Reference

3. Virus
• In computer technology, virus are malicious software
program, a form of malware. By definition, viruses
exist on local disk and spread from one computer to
another sharing of infected files
• It also has the ability to affect the normal operation
of a computer system.

4. Types of Virus
• Trojan Horse
• Salami Attack

5. Trojan Horse
• A Trojan horse, is software that appears to
perform a desirable function for the user
prior to run or install, but (perhaps in addition
to the expected function) steals information
or harms the system.
• The term is derived from the Trojan Horse
story in Greek Mythology.

6. Salami Attack
• Salami attack is an attack on a computer network.
• Involves the intruder siphoning off small amounts of money
from a file and placing them in another file that he or she
can access.
• Would add a small amount to a debit which the account holder
would not check.
• The name Salami Attack comes from the fact that salami is
cut into a very thin slices which refers the money in the
account stolen bit by bit.

7. Conclusion
• Trojan Horse
• We should install an antivirus software to protect our
machine and make sure that an up-to-date virus
signature file has been applied delete browsing history
regularly.
• Salami Attack
• Analyze the source code.
• Find indications of an attack.
• Do not ignore what appear to be errors in computer.

8. Sources of references
• www.wikipedia.com
• www.google.com
• www.yahoo.com