Cruda, mayday pp tx 2
•Download as PPTX, PDF•
0 likes•268 views
The document discusses computer viruses including their history, types, and effects. It lists different types of viruses such as memory resident viruses, direct action viruses, overwrite viruses, boot sector viruses, macro viruses, and more. The document also describes how viruses can slow down computers, corrupt files, damage the boot sector, steal information, and make computers unusable in worst cases. It provides examples of viruses and recommends scanning emails, using firewalls, installing antivirus software, avoiding suspicious websites and downloads to counter computer viruses.
More Related Content
What's hot
What's hot (20)
Viewers also liked
Viewers also liked (20)
Similar to Cruda, mayday pp tx 2
Similar to Cruda, mayday pp tx 2 (20)
Recently uploaded
Recently uploaded (20)
Cruda, mayday pp tx 2
- 2. Objectives • Name some Computer Virus • List different attacks of computer viruses
- 3. HISTORY OF COMPUTER VIRUS
- 7. Program that spread, replicate and Interferes computer operation
- 9. Viruses can • slow down your computer • corrupt your system files • make some programs faulty or corrupt • damage your boot sector • Tie up Internet traffic • turn your computer into a slave • steal important information from your computer • change the power ratings and blast your computer • worst case can make your computer unusable
- 10. Viruses behave in different ways • Hide in the system • Replace files • Replicate files • Delete files • Run programs • Send files and info • Deny access • Reboot computers • Clog your memory
- 12. Email attachments Rogue Websites Networks Infected storage disks Infected Software Fake Anti Virus Software Pirated programs From Mobile Devices
- 13. Different types of Computer Virus
- 14. • Memory Resident Virus • Companion Viruses • Direct Action Viruses • FAT Virus • Overwrite Viruses • Multipartite Virus • Boot Sector Virus • Web Scripting Virus • Macro Virus • Worms • Directory Virus • Polymorphic Virus • Trojans • Logic Bombs • Rootkits
- 15. • Memory Resident Virus • Companion Viruses • Direct Action Viruses • FAT Virus • Overwrite Viruses • Multipartite Virus • Boot Sector Virus • Web Scripting Virus • Macro Virus • Worms • Directory Virus • Polymorphic Virus • Trojans • Logic Bombs • Rootkits
- 16. OVERWRITE VIRUS deletes information contained in the files that it infects and sometimes reboot the system EX. Way Trj.Reboot Trivial.88.D DAMAGE: files may be partially or totally useless
- 17. DIRECTORY VIRUS (CLUSTER) changing the path that indicates the location of a file and renaming all executable to non-executable extensions. When you run the program, you first run the virus EX. Dir-2 virus (creeping death) DAMAGE: Once infected, it becomes impossible to locate the original files.
- 18. FAT virus Damaged the part of a disk used to store all the information about the location of files, available space, unusable space, etc. FILE ALLOCATION TABLE Ex. Link Virus Damage: cause serious damage to computer reformat needed.
- 19. WEB scripting Virus originated from websites used for social networking. Attached a link that could lead to other harmful sites. Symptoms Yahoo and Google search will be re-directed Homepage of web browser, desktop background often get changed automatically Damage: slow down the performance of the machine
- 20. Trojans • Disguise as a useful program • steal end-user information (credit card info, banks etc.) • perform destructive harm on the target computer • download additional computer malware Took its name From the Greek myth ‘Trojan Horse’ ex. Chernobyl virus 1998 Damage: perform destructive features on the computer.
- 21. Worms replicates itself in order to spread to other computers sends out hundreds or thousands of copies creating a huge devastating effect Ex. Morris worm – worth damaged between $10,000,000 and $100,000,000 ILOVEYOU virus - Onel A. de Guzman, $5.5 billion to $8.7 billion in damages. 10% of all Internet- connected computers were hit. Damage consumes too much system memory(or network bandwidth), causing Web servers, network servers and individual computers to stop responding
- 22. Rootkit allow viruses and malware to “hide in plain sight” by disguising as necessary files that your antivirus software will overlook Worst case: control your computer and turn it into ‘Zombie’ “secretly compromised by hacking tools which allow a third party to control the computer and its resources remotely”
- 23. HOW TO COUNTER COMPUTER VIRUS
- 26. INSTALL A RELIABLE ANTIVIRUS
- 31. Computer Virus • Memory Resident Virus • Companion Viruses • Direct Action Viruses • FAT Virus • Overwrite Viruses • Multipartite Virus • Boot Sector Virus • Web Scripting Virus • Macro Virus • Worms • Directory Virus • Trojans • Polymorphic Virus • Logic Bombs • Rootkits
- 32. Viruses can • slow down your computer • corrupt your system files • make some programs faulty or corrupt • damage your boot sector • Tie up Internet traffic • turn your computer into a slave • steal important information from your computer • change the power ratings and blast your computer • worst case can make your computer unusable