slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
VIRUS TECHNOLOGY PowerPoint Presentation
Download Presentation
VIRUS TECHNOLOGY

Loading in 2 Seconds...

play fullscreen
1 / 24

VIRUS TECHNOLOGY - PowerPoint PPT Presentation


  • 162 Views
  • Uploaded on

VIRUS TECHNOLOGY. INTRODUCTION. The basics of computer Virus Summarizing what they are ? How they attack ? What we can do to protect our selves ?. What is Computer Virus ?.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'VIRUS TECHNOLOGY' - darice


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
introduction
INTRODUCTION
  • The basics of computer Virus
  • Summarizing what they are ?
  • How they attack ?
  • What we can do to protect our selves ?
what is computer virus
What is Computer Virus ?
  • A comp. Virus is a coded program that is written in Assembly or System programming language to gain entry into host system and modify existing program and perform a series of action without user consent
history of computer viruses
HISTORY OF COMPUTER VIRUSES
  • The Pre-Historic Period
  • The Early Times
  • The Middle Ages
  • The Current Picture
  • The Emerging Scenario
classification of viruses
CLASSIFICATION OF VIRUSES
  • General Classification Of Viruses
  • Behavioral Classification of Viruses
general classification of virus
General Classification Of Virus

Viruses

Boot Sector Viruses

File Viruses

Directory Viruses

Parasitic Virus

MacroVirus

Hard Disk Master Boot Record (MBR)/ Partition Table Viruses

Floppy Disk Boot Sector Viruses

behavioral classification of virus
Behavioral Classification of Virus
  • Nature Of Attack
  • Deception Techniques Employed
  • Frequency of Infection

Next

nature of attack
Nature Of Attack

Viruses

Direct Action Viruses

Resident Virus

Back

deception techniques employed
Deception Techniques Employed

Viruses

Stealth Virus

Polymorphic

Virus

Cavity Virus

Tunneling Virus

Batch File Virus

Camouflage Viruses

Armored Viruses

Companion Viruses

Multipartite Viruses

Back

frequency of infection
Frequency of Infection

Viruses

Fast Infector Virus

Slow Infector Viruses

Sparse Infector Viruses

Back

life cycle of a virus
LIFE CYCLE OF A VIRUS

Propagation

The virus spreads to other systems

The propagated virus is activated

Gestation

Activation

STAGE - 3

STAGE - 2

STAGE - 4

The created virus is released to the outside world

Users become aware of the virus and isolateit

STAGE - 1

STAGE- 5

Discovery

Creation

The same or a diff. developer develops a diff. strain of a new virus and the progress begins afresh

Vaccine for the virus is developed

STAGE - 6

STAGE - 7

Assimilation

Eradication

When the use of vaccine become widespread thevirus is eradicated

qualities of a virus

QUALITIES OF A VIRUS

A virus must incorporate a replicating routine.

A virus should be able to install itself in the RAM.

A virus has a trademark trigger routine.

Some viruses have an encryption routine.

Most viruses are designed to exhibit some sort of stealth characteristics to avoid detection.

how does virus works

HOW DOES VIRUS WORKS

Enter by email,downloads,floppy disk or hacking

Then make copies of itself to spread.

They will wait for the signal for being activated.

symptoms of a virus infection

SYMPTOMS OF A VIRUS INFECTION

Graphics and unusual text will appear.

Music will play for no reason.

Program and data file suddenly corrupted.

Disk volume is changed.

Files and directories have been changed suddenly.

Your computer goes slowdown.

System memory have been changed.

Hardware devices begin to exhibit unusual behavour.

Interrupt vector have been changed.

how viruses spread so quickly

HOW VIRUSES SPREAD SO QUICKLY ?

The larger amount of spreading the virus is user base, the more widespread and quicker the infection.

The level of piracy is also influence to spread.

The complexity & characteristics of the virus code helps a virus to spread effectively.

Internet is also cause to spread the virus quickly.

positive virus

POSITIVE VIRUS

A virus is ‘bad’ or ‘good’ depends on the virus developer.

Virus is made of two parts.

 Propagation mechanism.

 Payload.

Propagation mechanism Spreads comp. To comp.

It is a technical challenge that lets fun of designing it.

Propagated virus automatically spreading until halted.

Entire meaning is easy to get and hard to recover.

Ex. If a virus which acts as anti-virus that detect the

negative virus and remove from the system.

i love you virus

“I LOVE YOU” VIRUS

A love letter which is win32 based on e-mail

attachments.

HOW DO I GET IT ?

Attachment named : LOVE-LETTER-FOR YOU.TXT

The warning is protect.vbs.

When it opened virus infects to the system.

Unless you are sure that the doc. Is free from virus.

If you are unsure than ask to the sender to confirm.

Difficult to open .mp2 , .mp3 , .midi , .wav Etc.

Difficult to open .jpg , .bmp , .gif etc

what is anti virus

What is Anti-Virus

Anti-Virus is a specialized utility program which is used to detect , eradicate and prevent viruses.

different anti virus technology
DIFFERENT ANTI-VIRUS TECHNOLOGY
  • Hook Driver

It provides databases in notes.

  • Extension Manager

It allows a program to be run natively.

how effective is an anti virus s w is

HOW EFFECTIVE IS AN ANTI-VIRUS S\W IS ?

Methodology of detecting, and incorporate anti-virus.

They have their own database to compare string of virus string to detect.

An intelligent virus may breakdown your anti-virus s\w.

Timely and regularly upgrade the anti-virus s\w

If more than one user use one computer ,always check all local drives after download any data.

NEXT

could anti virus program itself be infected

COULD ANTI-VIRUS PROGRAM ITSELF BE INFECTED?

Clever virus may infect the anti-virus s\w.

Parallel you might be use the another corporate anti-virus.

If one fails than the other might be detect.

The developer make an anti-virus s\w after confirmation.

NEXT

qualities of an anti virus s w

QUALITIES OF AN ANTI-VIRUS S\W.

Directly it remove to your system memory.

Example of virus which is same as cancer cells.

Two ways of virus detection.

Signature based like polymorphic virus.

Rule based like genetic in nature.

Cat and mouse game bet’n developer and writers.

NEXT

limitations of anti virus programs

LIMITATIONS OF ANTI-VIRUS PROGRAMS

Limited database virus strings.

old version can’t detect.

Directly not work on on-line services.

Restricted coverage area for an anti-virus s\w

NEXT

conclusion
CONCLUSION
  • While using diff. External Data storage devices like cd’s,

floppy disk

  • scan all the system with the help of upgrade anti-virus

soft-ware.

  • The hazard ness cause by the virus to our system for which we have to take care.
  • “PREVENTION IS ALLWAYES BETTER THAN CURE”.