This document provides an overview of different types of malware, including viruses, worms, Trojans, rootkits, spyware, and keyloggers. It defines each type and describes how they work and the harm they can cause. Viruses and worms spread automatically while Trojans and rootkits conceal their presence on a system. Spyware tracks users' online activities for advertising while keyloggers record keyboard inputs to steal login credentials and passwords. The document also discusses disadvantages of malware infections like slow performance and unlaunchable applications. It recommends using security software like antivirus, antispyware, and firewalls to prevent malware and provides tips for removing infections like using anti-malware tools or reinstalling the operating system.

1. HEKMAT ASEFI – DMC COLLEGE, GOA
university (India)
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IT viruses

2. Table of Content
 What is Malware?
 Kinds of Malware
 Viruses and worms
 Trojans and Rootkits
 Spyware and keyloggers
 Disadvantage of Malware
 How do you get rid of malware?
 Ways to stay save from malware?
 How do you prevent malware?
 10 signs that your computer is infected with viruses,
Malware, or Trojans.
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3. What is Malware?
The term malware is defined by malicious intent.
malware designed to damage or gain authorized
access to a private computer system.
This malicious software ( malware) created by
hackers to damage computer operations , gather
sensitive information.
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4. Different types of malware
The term malware includes computer viruses .
There are many types and each one can damage
or computer like…
 worms, Trojan horses, rootkits, spyware,
adware Keyloggers and more. To get an
overview of the difference between all these
types of threats and the way they work, it makes
sense to divide them into groups.
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5. Viruses and worms- The contagious
threat
 Viruses and worms are defined by their behavior –
malicious software designed to spread without the user’s
knowledge. A virus infects legitimate software and when
this software is used by the computer owner it spreads the
virus – so viruses need you to act before they can spread.
Computer worms, on the other hand, spread without user
action. Both viruses and worms can carry as so called
“payload” Malicious code designed to do damage.
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6. Trojans and rootkits – The masked threat
 Trojans and rootkits are grouped together as they both seek to
conceal attacks on computers. Trojan Horses are malignant pieces of
software pretending to be benign applications. Users therefore
download them thinking they will get a useful piece of software and
instead end up with a malware infected computer. Rootkits are
different. They are a masking technique for malware, but do not
contain damaging software. Rootkit techniques were invented by
virus writers to conceal malware, so it could go unnoticed by
antivirus detection and removal programs. Today, antivirus products,
like Bull Guard Internet Security, strike back as they come with
effective rootkit removal tools.
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7. Spyware and keyloggers - the financial
threat Spyware is software that spies on you, tracking your internet activities in
order to send advertising (Adware) back to your system.
 Records everything you type on your PC in order to glean your log- in
names, passwords, and other sensitive information, and send it on the
sours of the keylogging program. Many times keyloggers are used by
corporations and parents to acquire computer usage information.
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8. Disadvantage of Malware
 Some of the disadvantages are:
 You can get viruses on your computer/laptop and this can cause many
problems
 Your computer /laptop can get slow
 Some of your application wont start
 You can get viruses on your computer and cause many Problems which can
damage your computer and can break your computer completely. usually,
malware displays pop- up ads on your desktop or steal your information.
Some of the nastier ones can even crash your computer and delete your
files also can make your computer slow on starting up applications such as
the internet. However, sometimes your application will not start as there
might be so much viruses on your computer they are stopping you to open
an application.
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9. How do you get rid of malware?
 The best way to get rid of malware is to prevent it from getting
into your computer. That is why it is very important to have
security software such as antivirus, antispyware and firewall
software. With these three, you can be assured that malware will
not make it into your computer, or at least, such threats are
minimized. As long as the right software is used and you make
sure it can connect to the internet to receive updates, you don’t
have to worry much about malware. However, if your computer
is already infected with malware, depending on the
circumstance, you may need to reinstall your OS, reformat your
hard drive, or simply clean your computer using anti-spyware or
antivirus software if you still don’t have.
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10. How can you prevent malware?
 Use Firefox instead of IE. Firefox is immune to much of the
most common malware tricks. With the addition of adblock
and no script its virtually impenetrable.
 Download spybot search and destroy (linked below). It can
immunize you from many different attack vectors, for added
security you use its teatimer app to protect your registry,
although it can be annoying.
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11. 10 Signs that your computer is
infected with Viruses, Malware, or
Trojans 1. My computer speaks to me.
2. My computer is running extremely slowly.
3. Application won’t start.
4. I cannot connect to the internet or it runs very slowly.
5. When I connect to the internet, all types of window open or the
browser displays pages I have not requested.
6. Where have my files gone?
7. Oh.. My antivirus has disappeared, my firewall is disabled
8. My computer is speaking a strange language.
9. Library files for running games, programs, etc. have disappeared from
my Computer.
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12. 10. My computer has gone mad …. Literally. 12

13. THANK YOU
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