computer viruses power point presentationRohit Kashyap
The document discusses computer viruses, how they spread, types of viruses, and how to prevent and cure virus infections. Computer viruses are software programs that replicate like biological viruses and can spread by attaching to other files. When files are exchanged between computers, the virus can spread. Viruses can slow down systems, use memory, and even crash computers. Antivirus software can be installed to prevent and remove viruses, and files should only be downloaded from trusted sources.
This document provides an overview of antivirus software, including what it is, how it works, configuring antivirus programs, symptoms of an infected computer, manually deleting virus files, effectiveness of antivirus software, damaged files, popular antivirus programs, and online antivirus scanning. It discusses how the first antivirus software was developed in 1987 to combat the first computer virus. It also explains how antivirus software uses virus definitions to examine files and remove viruses, worms, and trojans.
This document provides an introduction and overview of computer viruses. It defines computer viruses and explains how they work, discussing how viruses actively infect systems and spread. It categorizes common types of computer viruses such as macro viruses, memory resident viruses, overwrite viruses, and more. Specific virus names are listed as examples for each category. The document also discusses how to protect systems from computer viruses and describes some problems caused by viruses.
Security Awareness related to common malwares, (viruses, trojans, worms etc) the damages they cause and basic countermeasures one can adopt to protect against them.
Botnets are networks of private computers infected with malicious software and controlled without the owners' knowledge. They are commonly used to launch distributed denial-of-service (DDoS) attacks and crack password files using brute force. An attacker first establishes command and control servers, then spreads bots to vulnerable devices using protocols like IRC and HTTP. Large botnets of thousands of devices allow password files to be cracked much faster than by a single computer. Common bot attacks include DDoS, spyware, click fraud, and password cracking. Users can help prevent infection by using antivirus software, firewalls, and keeping systems up to date.
A computer virus is a program that installs itself and runs without permission on an infected computer. There are different types of viruses like email viruses, trojan horses, and worms. Viruses can spread through email attachments, websites, networks, software, and removable drives. Symptoms of a virus include slow performance, unexpected program/file changes, browser issues, and unauthorized emails sent from the infected device. People are advised to use antivirus software, practice safe browsing/email habits, keep systems updated, and use firewalls to protect against viruses. Popular antivirus programs are listed that can help keep computers secure.
Attacks can come in many forms like viruses, worms, trojans, spam, adware, malware and phishing. Hackers intentionally access computer resources without authorization. Denial-of-service attacks overload servers to deny users access. While early hackers were curious, today's criminals dominate attacks. On the horizon, cyberterrorism and cyberwarfare from governments could cause widespread damage. Security is primarily a management issue involving risk analysis and comprehensive protection across assets, access control, firewalls, intrusion detection/prevention systems, and host hardening through vulnerability testing.
The document discusses viruses and anti-virus software. It provides a 9 point lesson plan on viruses, including what they are, how they spread, their evolution timeline from 1983-2007, statistics on known viruses, the differences between crackers and hackers, and the main types of viruses such as boot viruses, time bombs, worms, and Trojan horses. The goals are to increase knowledge on preventing and combating viruses through behavioral changes.
computer viruses power point presentationRohit Kashyap
The document discusses computer viruses, how they spread, types of viruses, and how to prevent and cure virus infections. Computer viruses are software programs that replicate like biological viruses and can spread by attaching to other files. When files are exchanged between computers, the virus can spread. Viruses can slow down systems, use memory, and even crash computers. Antivirus software can be installed to prevent and remove viruses, and files should only be downloaded from trusted sources.
This document provides an overview of antivirus software, including what it is, how it works, configuring antivirus programs, symptoms of an infected computer, manually deleting virus files, effectiveness of antivirus software, damaged files, popular antivirus programs, and online antivirus scanning. It discusses how the first antivirus software was developed in 1987 to combat the first computer virus. It also explains how antivirus software uses virus definitions to examine files and remove viruses, worms, and trojans.
This document provides an introduction and overview of computer viruses. It defines computer viruses and explains how they work, discussing how viruses actively infect systems and spread. It categorizes common types of computer viruses such as macro viruses, memory resident viruses, overwrite viruses, and more. Specific virus names are listed as examples for each category. The document also discusses how to protect systems from computer viruses and describes some problems caused by viruses.
Security Awareness related to common malwares, (viruses, trojans, worms etc) the damages they cause and basic countermeasures one can adopt to protect against them.
Botnets are networks of private computers infected with malicious software and controlled without the owners' knowledge. They are commonly used to launch distributed denial-of-service (DDoS) attacks and crack password files using brute force. An attacker first establishes command and control servers, then spreads bots to vulnerable devices using protocols like IRC and HTTP. Large botnets of thousands of devices allow password files to be cracked much faster than by a single computer. Common bot attacks include DDoS, spyware, click fraud, and password cracking. Users can help prevent infection by using antivirus software, firewalls, and keeping systems up to date.
A computer virus is a program that installs itself and runs without permission on an infected computer. There are different types of viruses like email viruses, trojan horses, and worms. Viruses can spread through email attachments, websites, networks, software, and removable drives. Symptoms of a virus include slow performance, unexpected program/file changes, browser issues, and unauthorized emails sent from the infected device. People are advised to use antivirus software, practice safe browsing/email habits, keep systems updated, and use firewalls to protect against viruses. Popular antivirus programs are listed that can help keep computers secure.
Attacks can come in many forms like viruses, worms, trojans, spam, adware, malware and phishing. Hackers intentionally access computer resources without authorization. Denial-of-service attacks overload servers to deny users access. While early hackers were curious, today's criminals dominate attacks. On the horizon, cyberterrorism and cyberwarfare from governments could cause widespread damage. Security is primarily a management issue involving risk analysis and comprehensive protection across assets, access control, firewalls, intrusion detection/prevention systems, and host hardening through vulnerability testing.
The document discusses viruses and anti-virus software. It provides a 9 point lesson plan on viruses, including what they are, how they spread, their evolution timeline from 1983-2007, statistics on known viruses, the differences between crackers and hackers, and the main types of viruses such as boot viruses, time bombs, worms, and Trojan horses. The goals are to increase knowledge on preventing and combating viruses through behavioral changes.
Computer viruses and related threats were presented. Malware is defined as software designed to harm computers without the owner's consent. Common malware types were discussed including viruses, trojans, spyware, and worms. Viruses can replicate and spread, infecting files and corrupting data. Antivirus software uses signature detection, behavior monitoring, and heuristic analysis to identify and remove viruses and prevent infection. Regular antivirus updates and safe computing practices were recommended to protect against evolving malware threats.
The document discusses computer viruses including what they are, why they are created, a brief history of viruses, types of viruses, and ways to prevent virus infections. It defines a computer virus as a program designed to harm infected computers. It then covers different types like macro, memory resident, overwrite, and direct action viruses. The document also discusses virus symptoms, notable viruses from the past, and recommends only downloading files from trusted sites and using antivirus software to prevent virus infections.
Este documento describe spyware y adware. Explica que el spyware es software espía que se instala ocultamente en una computadora para obtener información sin el consentimiento del usuario y enviarla a terceros. El adware muestra publicidad agresiva como pop-ups y barras de herramientas. El documento ofrece consejos sobre cómo detectar y protegerse contra estos tipos de software malicioso usando antivirus y antiadware actualizados regularmente.
The presentation is about Ransomware attacks. It includes
~What is Ransomware?
~History of Ransomware
~How it works?
~Types of Ransomware
~How to prevent Ransomware attacks
~Biggest Ransomware attack
~Impact of Ransomware Attacks
~Facts and figures related to Ransomware
The document discusses the history and types of computer viruses. It was created by Shabnam Bashir. The first known computer virus, called the Elk Cloner, was created in 1982 by Rich Skrenta. There are now over 287,524 known computer viruses as of February 2009. Common types include Trojan horses, worms, boot sector viruses, file viruses, and macro viruses. The document then lists symptoms of virus infection and recommendations for prevention.
A computer virus is a software program created by a human programmer that can reproduce itself and adversely affect computers without the user's knowledge, potentially erasing data or corrupting programs. Common sources of virus transmission include CD-ROMs, USBs, and the internet. Anti-virus software scans systems automatically on startup to detect and remove viruses, helping prevent infection from these common transmission sources.
The document provides an overview of malware types and techniques. It discusses viruses, worms, trojans, rootkits, and other malware. It describes how malware infects systems, propagates, and hides. Historic malware examples like Morris worm, Code Red, and SQL Slammer are summarized. Methods for malware detection like signatures, heuristics, sandboxing, and network monitoring are also covered at a high level.
This document summarizes a seminar presentation on computer worms, viruses, and prevention. It defines worms and viruses, describing how each infects computers and spreads. Worms replicate faster than viruses and don't typically infect files. Both can be prevented by regularly updating software, only opening expected email attachments, avoiding illegal downloads, and using antivirus software like Norton, McAfee, and Kaspersky. Antivirus software works by intercepting files during access or downloads and alerting the user if infections are found.
This document provides an overview of computer viruses. It discusses how viruses spread by attaching themselves to files and transferring between computers. Various types of viruses are described like boot viruses, polymorphic viruses, macro viruses, worms, and trojans. Symptoms of a virus infection include slow performance, reduced memory, and files becoming corrupted. The document recommends installing antivirus software, regularly updating it, and being cautious of email attachments to prevent and cure virus infections.
This document is a presentation on cyber security submitted by four students. It discusses the meaning of cyber security and the need for it to protect online data and systems from threats. It then covers major security problems like viruses, hackers, malware, Trojan horses, and password cracking. For each threat, it provides details on what they are, examples, and solutions or methods for prevention and protection. The presentation concludes by discussing some big cyber attacks in 2016, why cyber security is important, advantages of cyber security, individual responsibilities, and confirms that while complete security is impossible, being aware and smart can help reduce risks.
The document discusses computer viruses, how they spread and affect systems. It describes how the first virus, called "Creeper, was created in 1970s and outlines common ways viruses enter systems like through email attachments. Different virus types are outlined like memory resident viruses, boot sector viruses and macro viruses that hide in various parts of the system. Symptoms of virus infection and basic prevention tips are provided.
The document provides an overview of malicious software including viruses, worms, Trojan horses, and distributed denial of service (DDoS) attacks. It defines viruses as self-replicating code that attaches itself to other programs and executes when the host program runs. Worms are independent programs that replicate themselves across networks to infect other computers. The document also describes other types of malicious software like backdoors, logic bombs, and Trojan horses, and explains how DDoS attacks are constructed to overwhelm servers.
Computer viruses are destructive programs that disrupt normal computer functioning. There are several types of viruses including boot sector viruses, file infector viruses, and macro viruses. Viruses can slow computers down, delete files, crash systems, and corrupt data. They spread by infecting files and devices and are downloaded from unauthorized websites. Symptoms of a virus include slow performance, frequent crashing, and file corruption. People should use antivirus software, avoid unsafe downloads and inserts, and regularly scan their systems to protect against viruses.
Simon Pell gave a presentation on malware threats facing small businesses. He defined different types of malware like viruses, trojans, worms, and rootkits. Viruses self-replicate and infect files, while trojans and worms do not self-replicate but can still damage files. Rootkits are used to hide other malware. Spyware/adware collects user information without consent. Cookies are small text files that store website preferences. Pell stressed the importance of using updated antivirus software, firewalls, and being cautious of downloads. Firewalls can control network access and applications without slowing performance. Unified threat management provides additional protections like blocking suspicious websites and spam.
The document discusses computer viruses and worms, defining them as small software programs that spread from computer to computer (viruses), and programs that replicate over networks by exploiting security vulnerabilities (worms). It describes how viruses can damage systems by corrupting or deleting files, or using email to spread, while worms primarily consume computer resources as they rapidly copy themselves. The document also outlines the dormant, propagation, triggering, and execution phases of how viruses and worms typically operate on infected systems.
Cybercrime a growing threat of 21 st century !!!Asma Hossain
Cybercrime is a growing threat in the 21st century. It refers to criminal activities conducted using computers and technology. The first recorded cybercrime occurred in 1820, and cybercrime has evolved over time with new technologies. Cybercrime can target individuals, property, organizations, and society. Common cybercrimes include hacking, phishing, and spreading viruses. While no prevention method can eliminate cybercrime, education and using security software, backups, and firewalls can help reduce risks. International cooperation is needed to address cybercrime challenges.
Computer viruses are programs that spread by infecting other programs and files. They spread through infected data or programs copied from one system to another, or through email and internet files. There are different types of viruses like boot sector viruses, file infecting viruses, and program viruses. Viruses can damage systems by corrupting and deleting files, slowing performance, and erasing data. It is important to use antivirus software to scan for and remove viruses, keep backups, and avoid opening unknown files.
A computer virus is a malicious program that can replicate itself and spread from computer to computer without permission. It can slow down or damage infected systems. The first computer virus, called "Creeper," was created in 1971. Later viruses caused more harm by deleting files or collecting users' personal data. To avoid viruses, users should only download files from trusted sources, use antivirus software, keep systems updated, and be wary of email attachments from unknown senders. Other malware like spyware and Trojans also pose threats by monitoring users' activities or gaining control of infected devices without consent.
Computer viruses and related threats were presented. Malware is defined as software designed to harm computers without the owner's consent. Common malware types were discussed including viruses, trojans, spyware, and worms. Viruses can replicate and spread, infecting files and corrupting data. Antivirus software uses signature detection, behavior monitoring, and heuristic analysis to identify and remove viruses and prevent infection. Regular antivirus updates and safe computing practices were recommended to protect against evolving malware threats.
The document discusses computer viruses including what they are, why they are created, a brief history of viruses, types of viruses, and ways to prevent virus infections. It defines a computer virus as a program designed to harm infected computers. It then covers different types like macro, memory resident, overwrite, and direct action viruses. The document also discusses virus symptoms, notable viruses from the past, and recommends only downloading files from trusted sites and using antivirus software to prevent virus infections.
Este documento describe spyware y adware. Explica que el spyware es software espía que se instala ocultamente en una computadora para obtener información sin el consentimiento del usuario y enviarla a terceros. El adware muestra publicidad agresiva como pop-ups y barras de herramientas. El documento ofrece consejos sobre cómo detectar y protegerse contra estos tipos de software malicioso usando antivirus y antiadware actualizados regularmente.
The presentation is about Ransomware attacks. It includes
~What is Ransomware?
~History of Ransomware
~How it works?
~Types of Ransomware
~How to prevent Ransomware attacks
~Biggest Ransomware attack
~Impact of Ransomware Attacks
~Facts and figures related to Ransomware
The document discusses the history and types of computer viruses. It was created by Shabnam Bashir. The first known computer virus, called the Elk Cloner, was created in 1982 by Rich Skrenta. There are now over 287,524 known computer viruses as of February 2009. Common types include Trojan horses, worms, boot sector viruses, file viruses, and macro viruses. The document then lists symptoms of virus infection and recommendations for prevention.
A computer virus is a software program created by a human programmer that can reproduce itself and adversely affect computers without the user's knowledge, potentially erasing data or corrupting programs. Common sources of virus transmission include CD-ROMs, USBs, and the internet. Anti-virus software scans systems automatically on startup to detect and remove viruses, helping prevent infection from these common transmission sources.
The document provides an overview of malware types and techniques. It discusses viruses, worms, trojans, rootkits, and other malware. It describes how malware infects systems, propagates, and hides. Historic malware examples like Morris worm, Code Red, and SQL Slammer are summarized. Methods for malware detection like signatures, heuristics, sandboxing, and network monitoring are also covered at a high level.
This document summarizes a seminar presentation on computer worms, viruses, and prevention. It defines worms and viruses, describing how each infects computers and spreads. Worms replicate faster than viruses and don't typically infect files. Both can be prevented by regularly updating software, only opening expected email attachments, avoiding illegal downloads, and using antivirus software like Norton, McAfee, and Kaspersky. Antivirus software works by intercepting files during access or downloads and alerting the user if infections are found.
This document provides an overview of computer viruses. It discusses how viruses spread by attaching themselves to files and transferring between computers. Various types of viruses are described like boot viruses, polymorphic viruses, macro viruses, worms, and trojans. Symptoms of a virus infection include slow performance, reduced memory, and files becoming corrupted. The document recommends installing antivirus software, regularly updating it, and being cautious of email attachments to prevent and cure virus infections.
This document is a presentation on cyber security submitted by four students. It discusses the meaning of cyber security and the need for it to protect online data and systems from threats. It then covers major security problems like viruses, hackers, malware, Trojan horses, and password cracking. For each threat, it provides details on what they are, examples, and solutions or methods for prevention and protection. The presentation concludes by discussing some big cyber attacks in 2016, why cyber security is important, advantages of cyber security, individual responsibilities, and confirms that while complete security is impossible, being aware and smart can help reduce risks.
The document discusses computer viruses, how they spread and affect systems. It describes how the first virus, called "Creeper, was created in 1970s and outlines common ways viruses enter systems like through email attachments. Different virus types are outlined like memory resident viruses, boot sector viruses and macro viruses that hide in various parts of the system. Symptoms of virus infection and basic prevention tips are provided.
The document provides an overview of malicious software including viruses, worms, Trojan horses, and distributed denial of service (DDoS) attacks. It defines viruses as self-replicating code that attaches itself to other programs and executes when the host program runs. Worms are independent programs that replicate themselves across networks to infect other computers. The document also describes other types of malicious software like backdoors, logic bombs, and Trojan horses, and explains how DDoS attacks are constructed to overwhelm servers.
Computer viruses are destructive programs that disrupt normal computer functioning. There are several types of viruses including boot sector viruses, file infector viruses, and macro viruses. Viruses can slow computers down, delete files, crash systems, and corrupt data. They spread by infecting files and devices and are downloaded from unauthorized websites. Symptoms of a virus include slow performance, frequent crashing, and file corruption. People should use antivirus software, avoid unsafe downloads and inserts, and regularly scan their systems to protect against viruses.
Simon Pell gave a presentation on malware threats facing small businesses. He defined different types of malware like viruses, trojans, worms, and rootkits. Viruses self-replicate and infect files, while trojans and worms do not self-replicate but can still damage files. Rootkits are used to hide other malware. Spyware/adware collects user information without consent. Cookies are small text files that store website preferences. Pell stressed the importance of using updated antivirus software, firewalls, and being cautious of downloads. Firewalls can control network access and applications without slowing performance. Unified threat management provides additional protections like blocking suspicious websites and spam.
The document discusses computer viruses and worms, defining them as small software programs that spread from computer to computer (viruses), and programs that replicate over networks by exploiting security vulnerabilities (worms). It describes how viruses can damage systems by corrupting or deleting files, or using email to spread, while worms primarily consume computer resources as they rapidly copy themselves. The document also outlines the dormant, propagation, triggering, and execution phases of how viruses and worms typically operate on infected systems.
Cybercrime a growing threat of 21 st century !!!Asma Hossain
Cybercrime is a growing threat in the 21st century. It refers to criminal activities conducted using computers and technology. The first recorded cybercrime occurred in 1820, and cybercrime has evolved over time with new technologies. Cybercrime can target individuals, property, organizations, and society. Common cybercrimes include hacking, phishing, and spreading viruses. While no prevention method can eliminate cybercrime, education and using security software, backups, and firewalls can help reduce risks. International cooperation is needed to address cybercrime challenges.
Computer viruses are programs that spread by infecting other programs and files. They spread through infected data or programs copied from one system to another, or through email and internet files. There are different types of viruses like boot sector viruses, file infecting viruses, and program viruses. Viruses can damage systems by corrupting and deleting files, slowing performance, and erasing data. It is important to use antivirus software to scan for and remove viruses, keep backups, and avoid opening unknown files.
A computer virus is a malicious program that can replicate itself and spread from computer to computer without permission. It can slow down or damage infected systems. The first computer virus, called "Creeper," was created in 1971. Later viruses caused more harm by deleting files or collecting users' personal data. To avoid viruses, users should only download files from trusted sources, use antivirus software, keep systems updated, and be wary of email attachments from unknown senders. Other malware like spyware and Trojans also pose threats by monitoring users' activities or gaining control of infected devices without consent.
2. What is a computer virus?
What a computer virus do?
History of virus.
Why do people create viruses?
How do viruses spread?
Signs of a viruses in computer.
Types of computer viruses.
Anti virus software.
How an Anti virus works.
How to Protect your System Against Virus?
CONTENTS
4. Computer viruses are small software or code that
can cause damage to your data and software on a
computer.
What is a computer virus ?
5. A virus tries to take control of computer
system at the first opportunity available.
Also it makes copies of it self and try to
carry harmful task written in its program.
This process can happen so quickly that the
user is not even aware of the presence of a
virus in computer.
What a computer virus do?
6. Like any other field in computer science viruses have
evolved over the years.
The first computer virus was called ‘Creeper’.
It was invented in the early 1971 by Bob Thomas.
This program has been designed not to damage the
computer, but only to display a messages.
Since then, millions of viruses have been invented.
History of Virus
7. To take control of a computer and use it
for specific tasks.
To steal sensitive information (credit
card numbers, passwords, personal
details, data etc.)
Why do People Create Computer
Viruses?
Any programmer can make a virus to:
8. To take money.
To prove ones skill or for revenge purposes.
To disable a computer or network.
Any programmer can make a virus to:
Why do People Create Computer
Viruses?
12. Your computer functions slower than
normal.
Your computer responds slowly and
freezes often.
Your computer restarts itself often.
How to detect a Virus
Some signs that may indicate that your
computer is infected include:
13. How to detect a Virus
You see uncommon error messages.
Applications won't start.
Your antivirus has disappeared, and
firewall is disabled
Some signs that may indicate that your
computer is infected include:
14. Types of computer viruses
1. Macro virus
2. File Infector virus
3. Boot sector virus
4. E-mail virus
5. Trojan virus
6. Resident virus
7. Multipartite virus
8. Worm virus
There are so many types of computer
viruses some of them are :
15.
16. An antivirus software is a computer program that
identify and remove computer viruses, and other
malicious software like Worms and Trojans from an
infected computer.
Also an antivirus software protects
the computer from further virus attacks.
Anti virus software
17. The antivirus software examines each and every file
in a computer and examines its content with the
virus definitions stored in its virus dictionary.
A virus dictionary is an inbuilt file belonging to an
antivirus software that contains code identified as a
virus by the antivirus authors.
How an anti virus works?
18.
19. How to Protect your System Against
Virus?
To Protect your system against Viruses
you have to follow these steps :
20. How to Protect your System Against
Virus?
Install a good Anti-Virus software
on your computer.
Update Anti-Virus regularly.
To Protect your system against Viruses
you have to follow these steps :
21. How to Protect your System Against
Virus?
Be careful while Downloading files or
programs from the internet.
Always scan your floppies, CDs, flash
drives before using them.
To Protect your system against Viruses
you have to follow these steps :
22. Do not use pirated software.
Turn on firewall of your
computer operating system.
How to Protect your System Against
Virus?
To Protect your system against Viruses
you have to follow these steps :