logging in or signing up Viruses rstewart Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 3793 Category: Education License: All Rights Reserved Like it (2) Dislike it (0) Added: August 11, 2008 This Presentation is Public Favorites: 2 Presentation Description BTE Class Presentation Comments Posting comment... By: XkichyX (23 month(s) ago) thanks Saving..... Post Reply Close Saving..... Edit Comment Close By: laksh8ster (28 month(s) ago) can you send this presentation on my id laksh8ster@gmail.com, i really likes it n need it. Saving..... Post Reply Close Saving..... Edit Comment Close By: laksh8ster (28 month(s) ago) can you send this presentation on my id laksh8ster@gmail.com, i really likes it n need it. Saving..... Post Reply Close Saving..... Edit Comment Close By: chelseashane (29 month(s) ago) it's nice presentation easy to understand both to the lecturer and to the learner... i want it to share to my friend... liezel_dy@yahoo.com Saving..... Post Reply Close Saving..... Edit Comment Close By: stephenk (30 month(s) ago) Hi, Another super Presentation, very easy to follow. I would love a copy to keane-s@hotmail.com Saving..... Post Reply Close Saving..... Edit Comment Close loading.... See all Premium member Presentation Transcript VIRUSES : R. Stewart Fayetteville High School 2008-2009 VIRUSES Computer Technology Day 21 Computer Virus : R. Stewart Fayetteville High School 2008-2009 Computer Virus Set of program instructions that attaches itself to a file, reproduces itself, and/or spreads to other files It can Corrupt files Destroy data Display irritating messages Corrupt computer systems Spreading Viruses : R. Stewart Fayetteville High School 2008-2009 Spreading Viruses Viruses spread because people distribute infected files by exchanging disks and CDs, sending e-mail attachments, and downloading documents from the Internet. Viruses attach themselves to files with .exe, .com, or .vbs filename extensions When you open the infected file, the virus opens and waits to infect the next program you run or disk you use Spreading Viruses (continued) : R. Stewart Fayetteville High School 2008-2009 Spreading Viruses (continued) Viruses have the ability to lurk in a computer for days or months, quietly replicating themselves You may not even know your computer has a virus, thus making it easier to spread the virus Trigger Events : R. Stewart Fayetteville High School 2008-2009 Trigger Events An event that activates a task often associated with a computer virus Time Bomb Watches for the PC clock to reach a certain date to activate the virus Example Michelangelo virus Damages files on March 6 the artist’s birthday Logic Bomb Watches for a specific set of input to activate the virus Classification of Viruses : R. Stewart Fayetteville High School 2008-2009 Classification of Viruses File Virus : R. Stewart Fayetteville High School 2008-2009 File Virus Virus that attaches to an application program Example Chernobyl Notorious for overwriting a section of the hard disk, making it impossible to access data Boot Sector Virus : R. Stewart Fayetteville High School 2008-2009 Boot Sector Virus Infects the system files that your computer uses every time it is turned on Cause widespread damage and recurring problems Example Stoned Virus Every time you turn on your computer the virus is activated and infects any non-write-protected files including your hard disk Macro Virus : R. Stewart Fayetteville High School 2008-2009 Macro Virus Macro A miniature program that usually contains legitimate instructions to automate a document or task This virus infects a macro Example Melissa Virus Attaches itself to Microsoft Word documents Codemas Virus Attaches itself to Microsoft Excel spreadsheets Other Viruses : R. Stewart Fayetteville High School 2008-2009 Other Viruses Trojan Horse : R. Stewart Fayetteville High School 2008-2009 Trojan Horse Computer program that seems to perform one function while actually doing something else Different from a virus because it does not make copies of itself Different tasks that can be affected Stealing passwords Deleting files Trojan Horse Example : R. Stewart Fayetteville High School 2008-2009 Trojan Horse Example Worm : R. Stewart Fayetteville High School 2008-2009 Worm Software program designed to enter a computer system usually through a network, through security holes and then replicate itself Spreads from computer to computer Worm Example : R. Stewart Fayetteville High School 2008-2009 Worm Example Protecting yourself from viruses : R. Stewart Fayetteville High School 2008-2009 Protecting yourself from viruses Antivirus software Set of utility programs that looks for and eradicates a wide spectrum of problems, including viruses, Trojan horses, and worms Example McAfee Virus Scan Don’t open e-mails attachments that have strange names or are from people you don’t recognize Resource : R. Stewart Fayetteville High School 2008-2009 Resource Parsons, June Jamrich, and Dan Oja. Computer Concepts. Boston: Course Technology - Thompson Learning, 2002. You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
Viruses rstewart Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 3793 Category: Education License: All Rights Reserved Like it (2) Dislike it (0) Added: August 11, 2008 This Presentation is Public Favorites: 2 Presentation Description BTE Class Presentation Comments Posting comment... By: XkichyX (23 month(s) ago) thanks Saving..... Post Reply Close Saving..... Edit Comment Close By: laksh8ster (28 month(s) ago) can you send this presentation on my id laksh8ster@gmail.com, i really likes it n need it. Saving..... Post Reply Close Saving..... Edit Comment Close By: laksh8ster (28 month(s) ago) can you send this presentation on my id laksh8ster@gmail.com, i really likes it n need it. Saving..... Post Reply Close Saving..... Edit Comment Close By: chelseashane (29 month(s) ago) it's nice presentation easy to understand both to the lecturer and to the learner... i want it to share to my friend... liezel_dy@yahoo.com Saving..... Post Reply Close Saving..... Edit Comment Close By: stephenk (30 month(s) ago) Hi, Another super Presentation, very easy to follow. I would love a copy to keane-s@hotmail.com Saving..... Post Reply Close Saving..... Edit Comment Close loading.... See all Premium member Presentation Transcript VIRUSES : R. Stewart Fayetteville High School 2008-2009 VIRUSES Computer Technology Day 21 Computer Virus : R. Stewart Fayetteville High School 2008-2009 Computer Virus Set of program instructions that attaches itself to a file, reproduces itself, and/or spreads to other files It can Corrupt files Destroy data Display irritating messages Corrupt computer systems Spreading Viruses : R. Stewart Fayetteville High School 2008-2009 Spreading Viruses Viruses spread because people distribute infected files by exchanging disks and CDs, sending e-mail attachments, and downloading documents from the Internet. Viruses attach themselves to files with .exe, .com, or .vbs filename extensions When you open the infected file, the virus opens and waits to infect the next program you run or disk you use Spreading Viruses (continued) : R. Stewart Fayetteville High School 2008-2009 Spreading Viruses (continued) Viruses have the ability to lurk in a computer for days or months, quietly replicating themselves You may not even know your computer has a virus, thus making it easier to spread the virus Trigger Events : R. Stewart Fayetteville High School 2008-2009 Trigger Events An event that activates a task often associated with a computer virus Time Bomb Watches for the PC clock to reach a certain date to activate the virus Example Michelangelo virus Damages files on March 6 the artist’s birthday Logic Bomb Watches for a specific set of input to activate the virus Classification of Viruses : R. Stewart Fayetteville High School 2008-2009 Classification of Viruses File Virus : R. Stewart Fayetteville High School 2008-2009 File Virus Virus that attaches to an application program Example Chernobyl Notorious for overwriting a section of the hard disk, making it impossible to access data Boot Sector Virus : R. Stewart Fayetteville High School 2008-2009 Boot Sector Virus Infects the system files that your computer uses every time it is turned on Cause widespread damage and recurring problems Example Stoned Virus Every time you turn on your computer the virus is activated and infects any non-write-protected files including your hard disk Macro Virus : R. Stewart Fayetteville High School 2008-2009 Macro Virus Macro A miniature program that usually contains legitimate instructions to automate a document or task This virus infects a macro Example Melissa Virus Attaches itself to Microsoft Word documents Codemas Virus Attaches itself to Microsoft Excel spreadsheets Other Viruses : R. Stewart Fayetteville High School 2008-2009 Other Viruses Trojan Horse : R. Stewart Fayetteville High School 2008-2009 Trojan Horse Computer program that seems to perform one function while actually doing something else Different from a virus because it does not make copies of itself Different tasks that can be affected Stealing passwords Deleting files Trojan Horse Example : R. Stewart Fayetteville High School 2008-2009 Trojan Horse Example Worm : R. Stewart Fayetteville High School 2008-2009 Worm Software program designed to enter a computer system usually through a network, through security holes and then replicate itself Spreads from computer to computer Worm Example : R. Stewart Fayetteville High School 2008-2009 Worm Example Protecting yourself from viruses : R. Stewart Fayetteville High School 2008-2009 Protecting yourself from viruses Antivirus software Set of utility programs that looks for and eradicates a wide spectrum of problems, including viruses, Trojan horses, and worms Example McAfee Virus Scan Don’t open e-mails attachments that have strange names or are from people you don’t recognize Resource : R. Stewart Fayetteville High School 2008-2009 Resource Parsons, June Jamrich, and Dan Oja. Computer Concepts. Boston: Course Technology - Thompson Learning, 2002.