Malware is harmful software that threatens computer users and comes in many forms, including viruses, worms, spyware, and adware. Viruses spread by inserting themselves into other programs/files, while worms transmit over networks to infect other computers. Spyware programs gather user information for spying purposes, and adware attaches to free downloads to infect computers. Malware can spread through pirated software, computer networks/the internet by file sharing or visiting infected sites, and by opening email attachments from unknown sources. Symptoms of infection include computers not starting, error messages, programs malfunctioning, slow performance, and unexpected disk activity.

1. COMPUTER
SECURITY &
ETHICS
Chapter 06
Malware

2. MALWARE
Malware is:
Comprises of number of harmful software
that are threat to all computer users.
Common types of malware:
•Computer viruses
•Worms
•Spyware
•Adware

3. ✓ COMPUTER VIRUS
Computer virus is a type of malware that
spreads by inserting a copy of
itself into another program or file.
✓ WORMS
Worm is a malware that transmits itself over a
network to infect other
computer.
TYPES OF MALWARE

4. ✓ SPYWARE
Spyware programs are developed by spy on
computer users by gathering information
about their activities on the computer.
✓ ADWARE:
Adware is a malware that attaches itself to
free software on the internet and infects
computer where such software is downloaded.
TYPES OF MALWARE

5. 1. The computer does not start or it reboots automatically
when it is on.
2. Different types of error messages appear on the screen
3. Programs do not run in a normal way
4. Computer is running very slow
5. Hard disk activity is noticed without running any program.
SYMPTOMS OF MALWARE

6. The following are different ways malware can spread n computers.
✓ PIRATED SOFTWARE
Pirated software on CDs is a very common source of spread
malware on computers because these are often infected.
✓ NETWORK AND INTERNET
Computer connected to network gets infected with malware w
information is exchanged with other computers. Computers are
infected while using internet when user download something
browse infected web sites.
✓ E-MAIL ATTACHMENTS
Opening e-mail attachment from a stranger or from an unknown
address can infect computer with malware. Even download
opening e-mail from a friend or family member can be dangerous
HOW MALWARE SPREADS?

7. Short Questions:
1.Describe any five symptoms of
malware .
2.Write down the characteristics
of Spyware .
3.What activities does a flame
performed as a spyware software
Long Questions
1.Define Malware and describe its
types.
2.Explain how malware spreads
ASSIGNMENT
Refer text
book
HINT