Cruda, mayday pp tx 2
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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