that my presentation about virus and types of virus at soran university school of engineering enjoy :)

1. UNIVERSITY OF SORAN
Faculty of science & engineering
School of engineering
DPT of petroleum engineering
VIRUS
Prepared by:
Harem Abdullstar
Rebaz Abdullqadr
Omer Muhammed
Supervisor :
Mr. Aras Masoud

2. Contents?
what's a computer virus ?
Types of Viruses
Categories of Viruses
How do viruses work?
How an Antivirus works?
Conclusion

3. What is a virus?
A computer virus is a computer program that
can copy itself and infect a computer without
permission or knowledge of the user.
The computer viruses can damage or
corrupt data, modify existing data .

4. Types of virus
Boot sector Virus
Master Boot Record virus (MBR)
File infector virus
 Multipartite virus
 Macro Virus
Trojan Horse
 Worms
Logic Bombs
Polymorphic Virus

5. Boot sector Virus
 A boot sector virus infects boot sector of
computers. During system boot, boot
sector virus is loaded into main memory
and destroys data stored in hard disk.
E.g. Form, Disk
Killer, Michelangelo, Stoned.

6. Master Boot Record virus (MBR)
MBR viruses are memory-resident viruses
that infect disks in the same manner as
boot sector viruses.
E.g. AntiEXE, Unashamed, NYB

7. File infector virus
File infector viruses infect program files.
Normally infect executable code, such as
.COM, .SYS, .BAT and .EXE files.
E.g. Snow.A, Jerusalem, Cascade

8. Multipartite virus
A multipartite virus is a virus that can infect either
boot sectors or executables.
When it infects a boot sector, it works as a boot
sector infector.
E.g. One_Half, Emperor, Anthrax, Tequilla.

9. Macro Virus
Macro viruses infect files that are created using
certain applications or programs that contain
macros.
They infect documents created from Microsoft
Office Word, Excel, PowerPoint and Access files.
E.g.W97M.Melissa, Bablas, WM.NiceDay, W97M.
Groov.

10. Trojan Horse
A Trojan horse is a computer program that is
hiding a virus or other potentially damaging
program.
Trojan horses can be included in software that
you download for free or as attachments in
email messages.
E.g. Trojan.Vundo. Back
Orifice, NetBus, SubSeven

11. Worms
A computer worm is a self-replicating computer
program. It uses a network to send copies of
itself to other and it may do so without any user
intervention.
Work of worms
delete files on a host system
send documents via email
E.g.W32.Mydoom.AX@mm

12. How do viruses work?
Replicating itself
Interrupting system/network use
Modifying configuration settings
Flashing BIOS
Format hard drive/destroy data
Using computer/network resources

13. How an Antivirus works?
The antivirus software examines each and every
file in a computer and examines its content with
the virus definitions stored in its virus dictionary.
E.g. Avira
Kaspersky
Norton
Many more ……………

14. Thanks for your attention