Angela Mary Binoy
Annies Minu SathiyaSeelan
SICK OF COMPUTER
What they are…
Where they come from…
Why they are here…
4. Types Of Infections
6. Types Of Viruses
• The first computer virus was
called “Creeper.”It was
invented in the early
1970’s.Since then, millions of
viruses have been invented.
• The first known computer
virus was written in 1981 by a
man named Rich Skrenta . This
virus was termed Elk Cloner,
and was the first computer
virus to appear outside the
computer where it was
• A Computer Virus is a
program that can copy itself
and infect a computer
without the permission or
knowledge of the user.
• A Computer Virus has 2
major characteristics: the
ability to replicate itself, and
the ability to attach itself to
another computer file...
The following are a few Symptoms that your
computer might have a virus:
• Slow response and slow program execution.
• Random hard drive crashes and restarts.
• Distorted graphics and text.
• Files that have mysteriously vanished.
• Extensive pop-up ads.
• Inability to open files with existing passwords.
• A virus that can
encrypt its code in
different ways so
that it appears
differently in each
viruses are more
difficult to detect.
Hides within the computers memory.
It activates whenever the OS loads or operates.
This virus may be pernicious.
It is of 2 types:
• Removal of this virus is bit tricky.
• It may be designed to block the actions of Anti
There are few website that execute complex
code with the purpose to provide interesting
content ,these codes often get exploited and
due to this a virus becomes able to infect a
machine and to take actions on a machine via
website. This particular virus is called web
Infects computers running with
Discovered by IT security firm Seculert,
in December 2012.
Steals confidential data of the user.
Affects POS i.e. Point of sales.
Detected in online banking transaction
space on 19 January 2014 in India.
In 2012, a major ransom ware worm known as
Reveton began to spread.
A Reveton is a malware which attempts to
extort money from a user.
It claims that your computer has been used for
Encrypting ransom ware appeared in 2013 with
a worm known as "Crypto Locker”.
It gets Distributed either as an attachment to a
malicious e-mail or as a drive-by download.
CryptoLocker demands a payment with either a
MoneyPak card or Bitcoin to recover the key.
CryptoLocker to be extremely difficult to repair.