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ICT PRESENTATION

ICT PRESENTATION. VIRUS! BY FATINATUL NAZURAH ZAINUDDIN. CONTENT. CONTENT PAGE Introduction -3- Examples of viruses -4- What Computer Viruses Infect? -5- History about Viruses -7- Anti-Virus -8- Conclusion -9- References -10-. WHAT IS VIRUS ?.

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ICT PRESENTATION

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  1. ICTPRESENTATION VIRUS! BY FATINATUL NAZURAH ZAINUDDIN

  2. CONTENT CONTENTPAGE Introduction -3- Examples of viruses -4- What Computer Viruses Infect? -5- History about Viruses -7- Anti-Virus -8- Conclusion -9- References -10-

  3. WHAT IS VIRUS? A computer virus is a computer program that can replicate itself and spread from one computer to another. A true virus can spread from one computer to another when its host is taken to the target computer; for instance because a user sent it over a network or the Internet, or carried it on a removable medium such as a floppy disk, CD, DVD, or USB drive. 3

  4. EXAMPLES OF VIRUSES Trojan Horse :- -> steal information -> harm the computer system Salami Attack :- -> difficult to detect and trace Worm Logic Bomb Theft 4

  5. What Computer VirusesInfect? • System Sectors/Boot Records -> Viruses can infect the parts of the system that are used to run programs and perform functions such as start up and shut down. • Files -> Viruses can infect program files. These viruses stick to program files such as .com, .exe, .sys, etc. Some viruses hide in the memory of the computer at first, while others simply attack a specific software program, such as Microsoft Word. • Companion Files -> Viruses can create companion files that are a special type of file that adds files that run on the hard disk. 5

  6. Macros -> Viruses can infect macro or data files. • Disk Clusters -> Viruses can infect files through the disk directory. • Batch Files -> Viruses can use batch files to infect a computer. • Source Code -> Viruses can be in additional code that is added to actual program source code. • Visual Basic Worms -> These worms use the Visual Basic programming language to control a computer and perform tasks. 6

  7. HISTORY ABOUT VIRUS The first academic work on the theory of computer viruses was done in 1949 by John von Neumann In 1972 VeithRisak, his article describes a fully functional virus written in assembler language for a SIEMENS 4004/35 computer system. In 1984 Fred Cohen from the University of Southern California wrote his paper "Computer Viruses - Theory and Experiments". It was the first paper to explicitly call a self-reproducing program a "virus", a term introduced by Cohen's mentor Leonard Adleman. 7

  8. ANTI-VIRUS

  9. CONCLUSION Viruses are dangerous. You can maintain a relatively safe computer with a little bit of understanding and vigilance. Research any new viruses you hear about to make sure that the threat is real, if it is make sure your virus scanner is up to date.

  10. REFERENCES • http://en.wikipedia.org/wiki/Computer_virus • http://en.wikipedia.org/wiki/Trojan_horse_%28computing%29 • http://www.online.tusc.k12.al.us/tutorials/viruses/viruses.htm

  11. GROUP MEMBERS FATINATUL NAZURAH NOOR INSYIRA MARIAH IZZATI NURUL FATIN NAJWA

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