PL.Sriram PL.Sriram

Hoaxes

Network worms

It is a jungle out thereIt is a jungle out there

Trojan horses

Computer program.

It can copy itself.

Infect a computer.

Spreads from one computer to other.

Executable

Virus affection

1. In 2004 a computer virus infected 1 1. In 2004 a computer virus infected 1 million computers within one hour.million computers within one hour.

2. Virus has the power and capacity to destroy all files.

Different types of virus are,

Macro virus

Directory virus

Polymorphic virus

Companion virus

FAT virus

Changes the path that indicate the location of a file.

For example:The File extension becomes.EXE or .COM

POPULAR HOAXE POPULAR HOAXE

JDBGMGR (teddy-bear icon)JDBGMGR (teddy-bear icon)

It, Tricks users into deleting a file

Network Worm

•No host (self-contained)

•Copies itself

•Executable

Trojan Horse

No host (self-contained)

Does not copy itself

Type of virus

A Trojan Horse exploits computer ports letting its “friends” enter, and

MORE ON THE HORSE…….

“once a thief gets into your house he opens a rear window for his partners”

STOPPING THE TROJAN HORSESTOPPING THE TROJAN HORSE

How does it get in?

Downloading a file

By:

Installing a program

Opening an attachment

Copying a file from someone else

TYPICAL SYMPTOMSTYPICAL SYMPTOMS

• File deletionFile deletion

• File corruptionFile corruption

• Visual effectsVisual effects

• Erratic (and unwanted) behaviorErratic (and unwanted) behavior

• Computer crashesComputer crashes

POPULAR FALLACIESPOPULAR FALLACIESIf I never log off then my computer can

never get a virus

If I lock my office door then my computer can never get a virus

Companies create viruses so they can sell anti-virus software

My ISP will

protect me?

Microsoft will protect me

Antiviruses

Mcafee

Bit defender

G Data

Webroot

Kaspersky

Norton antivirus

Purpose of a virus ?

Who created virus ?

For what reason ?

Who created anti-virus ?

For what ?