top 10 computer virus

8/3/2019 TOP 10 Computer Virus

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Prepared By: Sandeep. Shekhawat


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10. CreeperFirst developed in 1971,

Creeper might well be the firstcomputer virus. It infected

PDP-11 computers connected

to ARPANET, the Defense

Department-run precursor to

the Internet. Once infected,

the computer would display

the message, Im the creeper,

catch me if you can! Self-

replicating but not toodangerous, Creeper opened

the door that the rest of this

list walked through.


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9. Elk Cloner

Written in 1982 by a high

school student, Elk Cloner

attacked Apple II computersvia floppy disk. On every 50th

boot, the virus would cause

the computer to display a

poem written by the hacker.


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8. The Morris Worm

Robert Morris wrote the

Morris Worm in 1988 while

still a graduate student at

Cornell. Considered the first

worm, it eventually lead toMorris becoming the first

person convicted under the

Computer Fraud and Abuse

Act. However, the story ends

happily, as Golden Richard III

noted that Morris now

teaches computer science at

MIT.


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7. ILOVEYOUThe original email virus,

ILOVEYOU caused massive

estimated financial damage,

with millions of computersinfected, according to Golden

Richard III. The email

masqueraded as a love letter

from a contact in a usersemail address book, and

prompted the user to open an

attachment containing the

virus. Beginning on March 4th,

2000, the virus infected over

50 million computers in only

nine days, and caused the CIA

and the Pentagon to shut

down their computers.


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6. Code RedNamed after the Mountain

Dew drink favored by the first

researchers to analyze theprogram, this worm first broke

out in July, 2001, infecting as

many as 360,000 computers in

a single day. According to

Richard III, the infectionproved so hard to stop because

the worm would continually

re-infect the same computer it

had been cleaned from. The

worm attacked Microsoft IS

servers, and caused massive

denial of service problems as it

ate up computing resources

and IT personnel time.


7/11Prepared By: Sandeep. Shekhawat

5. Nimda

Nimda was a rare combination

of a worm, a virus and a

Trojan horse. "NIMDA, thatwas a nasty one, said Richard

III. That was a Windows virus

that had a lot of different

methods of infection. It usedemail, web server exploits, all

kinds of different stuff. 2001

was a great year for viruses.

And how. Nimdas various

distribution tactics allowed it

to become the worlds most

widespread virus less than an

hour after it was released into

the wild.



4. Slammer Richard III described Slammer

as an extremely fast-spreading computer worm

that infected the majority of

infectable hosts within

minutes. Slammer first hit

the Internet at 5:30 AM, GMTon January 25, 2003. Ten

minutes later, 75,000

computers were infected with

the worm. The genius of the

worms design related to its

size, as, at only a few

hundred bytes long, the

whole program fit within a

single UDP packet.



3. BlasterThe Blaster was not a particularly

dangerous worm, due to aprogramming error, but it received

a lot of media attention

nonetheless. The worm exploited a

hole in Windows XP programming,

and, within its code, contained aspecific attack on Bill Gates that

read bill gates why do you make

this possible? Stop making money

and fix your software!! An 18-

year-old named Jeffery Lee Parson

was arrested and eventually

sentenced to spend a year and a

half in prison for writing an

updated version of the worm.



2. Welchia

Welchia remains one of the

most unusual worms in history,as it was designed to help

instead of hurt. A response to

the Blaster worm, Welchia

infected computers, cleared

out the Blaster infestation, and

then deleted itself. While

Richard III contends this was

just a case of hacker one-

upsmanship, he did say that itraised a lot of ethical questions

about the use of invasive virus

techniques for a positive end.



1. Commwarrior-AHello iPhone users; welcome to

the next level of viruses.

Commwarrior-A hit in the

summer of 2005, and it struck inan unsuspecting place: cell

phones. The first ever cell phone

virus, Commwarrior-A spread

through text messages, but only

infected 60 cell phones. Despitethe small number of infected

devices, security experts see

Commwarrior-A as the

beginning of a new kind of virus,

and worry that the spread of

smart phones means

Commwarrior-A was merely the

first in what will become a long

line of phone targeting malware.

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