19-04-2011, 12:34 PM
Presented by:
Aparna Bandge
Presentation1.pptx (Size: 406.99 KB / Downloads: 98)
How viruses get into computers
The four most common virus infections come from:
File – A virus type that infects existing files on the computer (~40%)
Macro – A virus that runs as a macro in a host application such as the MS Office applications (~35%)
VBScript – A virus that uses Windows VisualBasic Script functionality (~10%)
Internet Worm – A virus that is primarily characterized by it’s replication across the Internet (~5%)
What is Virus ?
“ Virus : A true virus is capable of self replication on a machine. It may spread between files or disks, but the defining character is that it can recreate itself on it’s own with out traveling to a new.”
Introduction
Computer virus have become today’s headline news
With the increasing use of the Internet, it has become easier for virus to spread
Virus show us loopholes in software
Most virus are targeted at the MS Windows OS
Virus Languages
ANSI COBOL
C/C++
Pascal
VBA
Unix Shell Scripts
JavaScript
Basically any language that works on the system that is the target
Classifying Virus - Types
Trojan Horse
Worm
Macro
PC Viruses
How they spread
A virus runs first when a legitimate program is executed.
The virus loads itself into memory and looks to see if it can find any other programs on the disk.
If it can find one, it modifies it to add the virus's code to the new program.
Then the virus launches the "real program."
Aparna Bandge
Presentation1.pptx (Size: 406.99 KB / Downloads: 98)
How viruses get into computers
The four most common virus infections come from:
File – A virus type that infects existing files on the computer (~40%)
Macro – A virus that runs as a macro in a host application such as the MS Office applications (~35%)
VBScript – A virus that uses Windows VisualBasic Script functionality (~10%)
Internet Worm – A virus that is primarily characterized by it’s replication across the Internet (~5%)
What is Virus ?
“ Virus : A true virus is capable of self replication on a machine. It may spread between files or disks, but the defining character is that it can recreate itself on it’s own with out traveling to a new.”
Introduction
Computer virus have become today’s headline news
With the increasing use of the Internet, it has become easier for virus to spread
Virus show us loopholes in software
Most virus are targeted at the MS Windows OS
Virus Languages
ANSI COBOL
C/C++
Pascal
VBA
Unix Shell Scripts
JavaScript
Basically any language that works on the system that is the target
Classifying Virus - Types
Trojan Horse
Worm
Macro
PC Viruses
How they spread
A virus runs first when a legitimate program is executed.
The virus loads itself into memory and looks to see if it can find any other programs on the disk.
If it can find one, it modifies it to add the virus's code to the new program.
Then the virus launches the "real program."