C
o
m
p
u
t
e
r
V
i
r
u
s
e
s
Computer Viruses Page
1
of
26
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Guidelines and tips
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Understanding Computer Viruses and Malware: Types, Effects, and Removal, Slides of Technology
An overview of computer viruses, worms, spyware, trojan horses, and malware. It explains how these malicious programs can infect computer systems, the different types of viruses (boot viruses, program viruses, multipartite viruses, stealth viruses, polymorphic viruses, and macro viruses), and methods for removing them. The document also covers anti-virus and anti-spyware software, as well as ways to protect against spyware, making it a useful resource for understanding and mitigating cyber threats. It is suitable for high school students and lifelong learners interested in cybersecurity.
Typology: Slides
2024/2025
1 / 26
This page cannot be seen from the preview
Don't miss anything!
Related documents
Partial preview of the text
Download Understanding Computer Viruses and Malware: Types, Effects, and Removal and more Slides Technology in PDF only on Docsity!
C
o
m^ p
u t e
r
V
i^ r
u s e
s
Removing Viruses From Infected
Machines
WORM
It generally spreads without user action and distributes complete copies (possibly modified) or itself across networks. It can consume memory or network bandwidth, thus causing a computer to stop responding.
SPYWARE
Technology that aids in gathering information about a person or organization without their knowledge. Can overload your system and shut down othe services.
MALWARE
A virus that refers to malicious software. A software designed specifically to damage or disrupt a system, such as a virus or a Trojan horse.
Aspects of Computer Virus
Finder. searches for the new uninfected file. Replicator. actually targets these files and infects them by multiplying themselves.
Sources of Virus Infection:
Infected CDs, DVDs, pen drives, etc E-mail Browsing infected sites Downloading files from the internet
Types of Viruses and Example:
- Program viruses ▪ It infects executable program files, such as those with extensions. BIN, .COM, .EXE, .OVL, .DRV (driver) and .SYS (device driver). ▪ These programs are loaded in memory during execution, taking the virus with them. ▪The virus becomes active in memory, making copies of itself and infecting files on disk. EXAMPLES: Sunday, Cascade
- Multipartite viruses ▪ A hybrid of Boot and Program viruses. ▪ It infects program files and when the infected program is executed, these viruses infect the boot record. EXAMPLES: Invader, Flip, and Tequila
- Polymorphic viruses ▪A virus can encrypt its code in different ways so that it appears differently in each infection. ▪ These viruses are more difficult to detect. EXAMPLES: Involuntary, Stimulate, Cascade, Phoenix, Evil, Proud, Virus 101
- Macro viruses ▪ A macro virus is a new type of computer virus that infects the macros within a document or template. ▪ When you open a word processing or spreadsheet document, the macro virus is activated and it infects the Normal template. EXAMPLES: DMV, Nuclear, Word Concept.
Ways on How to Remove Viruses
Buy or download and antivirus software Install the antivirus software Update antivirus software with the latest virus definitions Do a complete system scan
Methods of Eliminating Viruses