12-06-2012, 04:40 PM
SEMINAR ON COMPUTER VIRUSES
computerviru.ppt (Size: 439.5 KB / Downloads: 30)
INTRODUCTION
Virus: A self-replicating piece of computer code that can partially or fully attach itself to files or applications, and can cause your computer to do something you don't want it to do.
TYPES OF COMPUTER VIRUS
Trojan horses
Backdoor Trojans
Worms
Boot sector viruses
Parasitic virus (File virus)
Macro viruses
Multipartite viruses
Stealth viruses
Polymorphic viruses
TROJAN HORSES
Involves human interaction
Users run the program intentionally, but it does something more than user thought it would
Eg- troj/zulu
WORM
Replicates itself
Uses networks, email, and the Internet to infect other computers
Eg-Kakworm(VBS/Kakworm)
Love Bug
BOOT SECTOR VIRUSES
Boot-sector infectors
Attach to the “boot sector” of a disk
Virus activated whenever computer reboots
Eg- Form etc…
PARASITIC VIRUS
Also known as File Virus
Attach themselves to the programs and acts as a part of the program
Various techniques to infect the executables like companion, link, overwrite etc.
Eg-CIH(Chernobyl), Jerusalem etc..
HOW VIRUSES SPREAD
Virus spreads when we executes a program that containing virus code.
When there is a try to boot the file from an infected floppy disk containing boot sector virus.
Viruses spread when users share infected files and diskette and infected documents as e-mail attachments.
When PCs have been connected together to form a network, the damage can be worse, because the virus program spreads one PC to another, thus infecting all the work stations.
Viruses spread only through illegal unlicensed, pirated software.
computerviru.ppt (Size: 439.5 KB / Downloads: 30)
INTRODUCTION
Virus: A self-replicating piece of computer code that can partially or fully attach itself to files or applications, and can cause your computer to do something you don't want it to do.
TYPES OF COMPUTER VIRUS
Trojan horses
Backdoor Trojans
Worms
Boot sector viruses
Parasitic virus (File virus)
Macro viruses
Multipartite viruses
Stealth viruses
Polymorphic viruses
TROJAN HORSES
Involves human interaction
Users run the program intentionally, but it does something more than user thought it would
Eg- troj/zulu
WORM
Replicates itself
Uses networks, email, and the Internet to infect other computers
Eg-Kakworm(VBS/Kakworm)
Love Bug
BOOT SECTOR VIRUSES
Boot-sector infectors
Attach to the “boot sector” of a disk
Virus activated whenever computer reboots
Eg- Form etc…
PARASITIC VIRUS
Also known as File Virus
Attach themselves to the programs and acts as a part of the program
Various techniques to infect the executables like companion, link, overwrite etc.
Eg-CIH(Chernobyl), Jerusalem etc..
HOW VIRUSES SPREAD
Virus spreads when we executes a program that containing virus code.
When there is a try to boot the file from an infected floppy disk containing boot sector virus.
Viruses spread when users share infected files and diskette and infected documents as e-mail attachments.
When PCs have been connected together to form a network, the damage can be worse, because the virus program spreads one PC to another, thus infecting all the work stations.
Viruses spread only through illegal unlicensed, pirated software.