presentation about virus

2.  A computer virus is a computer program that can copy
itself and infect a computer.
 A true virus can spread from one computer to another
when its host is taken to the target computer; for
instance because a user sent it over a network or the
Internet, or carried it on a removable medium such as
a CD,DVD, or USB drive.
 Viruses can increase their chances of spreading to
other computers by infecting files on a network fill
system or a file system that is accessed by another
computer

3.  The first computer viruses was done by John vov Neumann
in 1949 who held lectures at the University of Illinois about
the "Theory and Organization of Complicated Automata“
 In 1972 Veith Risak published his article
"Selbstreproduzierende Automaten mit minimaler
Informationsübertragung" (Self-reproducing automata with
minimal information exchange). The article describes a fully
functional virus written in assembler language for a
SIEMENS 4004/35 computer system.

4.  The Terminal Man, a science fiction novel by Michael
Crichton(1972), told of a computer with telephone modem dialling
capability, which had been programmed to randomly dial phone
numbers until it hit a modem that is answered by another computer.
 The Creeper virus was first detected on ARPANET, the
forerunner of the Internet, in the early 1970s. Creeper was an
experimental self-replicating program written by Bob Thomas
 A program called "Elk Cloner" was the first computer virus to
appear "in the wild“ . Written in 1981 by Richard Skrenta , it
attached itself to the Apple DOS 3.3 operating system

5.  The four most common virus infection come from:
 File – A virus type that infect existing
files on the computer
 VBScript – A virus that uses
Windows Visual Basic Script
functionality
 Macro – A virus that runs as a macro in a host application such
as the MS Office applications
 Internet Worm – A virus that is primarily characterized by
it’s replication across the Internet

6.  ILOVEYOU - (2000) One of the most widespread and
rapidly spreading viruses ever, the ILOVEYOU virus spread
via e-mail, posing as an executable attachment sent by a
friend from the target's contact list.
 Code Red - (2001) IIS on Windows servers were the target
of this virus. It also launched denial of service (DoS) attacks.
 Nimda - (2001) Nimda used seemingly every possible
method to spread, and was very effective at doing so.
Nimda is notable for being one of the fastest spreading and
most widespread viruses ever.

7.  Melissa - (1999) The Melissa virus is notable because it is a
Word macro virus. It cleverly spread via e-mails sent to
contacts from the infected users' address books
 Sasser - (2004) Sasser exploited a buffer overflow and
spread by connecting to port 445 on networked Windows
systems. The chaos caused was possibly the worst ever, as
systems restarted or crashed.
 The Morris Internet Worm - (1988) The grandfather of
computer worms, the Morris worm infected Unix systems and
was notable for its "accidental" virulence.
 Blaster - (2003) Blaster exploited a Windows operating
system vulnerability and let users know of its presence with a
system shutdown warning.

8.  SQL Slammer - (2003) This tiny virus infected servers
running Microsoft's SQL Server Desktop Engine, and was very
fast to spread.
 Elk Cloner - (1982) Despite Apple's marketing that their
systems are less poem to viruses that was not always the
case. Notable as possible the first personal computer virus,
Elk Cloner infected the boot sector of Apple II floppies.
 Creeper - (1971) This is noted as possibly the first ever
computer virus. It infected computers on ARPANET. Mostly
the concept of Creeper has infected the minds of rogue
programmers through today.

9.  Orkut which is very popular in India, has been hit by a worm
named 'Bom Sabado‘. Analysts told that the virus attacked the
XSS of the site. This virus posted scraps to the Orkut users
with the text Bom Sabado and is sent to the users account by
the name of the other friends account it also adds affected
users to new Orkut groups.
 Facebook virus will force the users to “like” a content, and
send that to the friends of the affected user, thousands of users
affected by the virus which forces the user to like “Shocking!
This girl killed herself after her dad posted this photo’ ”

10.  In an article published by the Council on Foreign Relations, the
United States Deputy Secretary of Defense, William J. Lynn,
has confirmed that in 2008 the US army was the target of a
serious security breach. Because of this attack, from November
2008 onward, military staff were no longer allowed to use USB
Flash drives. While the background of this directive was
previously only reported by Wired magazine.

11.  Close to four days after the site of India’s key investigation
agency, the Central Bureau of Investigation (CBI), was hacked
and defaced.
 The web site of the CBI was hacked and defaced on a night.
The hackers calling themselves the “Pakistani Cyber Army” left
a message saying that the attack was in revenge for similar
Indian attacks on Pakistani sites.
 The CBI’s IT systems were not compromised by the hack, as
the web site and the CBI’s computer systems are separate,

12.  Windows is one of the most used OS. So people
try to make viruses on this OS. LINUX is used
rarely. There's a number of LINUX types, Red Hat,
SuSe, Ubuntu etc.
 If any one understand the source code of
Windows you can crack any other Windows
versions. But in the case of LINUX it is
different
 Not enough users of linux to warrant people
trying write viri for it. linux is not windows so
windows viri can't affect it.

13.  Notify the help desk when you receive a virus warning
from Norton Antivirus, Symantec Antivirus, Trend Micro,
etc.
 Most of the time, the virus software will detect and prevent
the infection. However, the help desk can better tell you
what to do