Computer_Virus

What is a Virus is an unwanted Program or application Make copies of itself Payloads Carry out a particular action Annoying Destructive How infection occurs Infected floppies and CD's Email and Internet Launch file and the virus code runs Copy itself and Make changes Infected removable flash device Trojan Horses Seemingly legitimate programme With hidden function (harmful) May be a programme that causes a virus infection Backdoor Trojans allow other users to take control of a PC across the Internet Worms Similar to viruses Make copies of themselves Use email to spread Spread throughout networks Kakworm, Sircam, Badtrans Effects of Viruses 1. Display messages, Pranks 2. Deny access to files 3. Data theft (email information) 4. Corrupt Data (change spreadsheets), Delete data 5. Disable hardware (Chernobyl) Virus Risks Internet: downloaded programs or documents Programs, Email with attachments Documents and Spreadsheets Floppy disks and CDs Preventing viruses Make users aware of the risks Install anti-virus software and Update software regularly Keep backups of all data Use of Anti virus Software Detects viruses Prevent access to infected files Eliminate infection Scanners (must be updated) On demand On access stay active on machine Heuristics (uses general rules to detect viruses) FamousViruses Love Bug Email: I love you: kindly check attached love letter coming from me Worm that sends itself to others in your address book Steals information and overwrites files Recent Viruses in Education Kakworm: Includes itself in all outgoing emails Magistr (sends files) deletes windows files Sircam (hi I need your advice) Cant open programs Badtrans Single click needed Side effects of viruses Prevent computers from working Cost money to sort out, Time consuming Confidentiality at risk, Damage credibility Put people off using PCs Switch to Macs' Email and viruses Spread very quickly Read an email (Kakworm): Hidden script changes system settings Sends viruses to other users by email, Mellissa first 50 in address book Attachments: document or spreadsheet when launched infect computer Some ways of stopping Email Viruses Save attachments and scan before opening Use anti-virus software Send word attachments as .rtf (no macros) Send spreadsheets as .csv (no macros) Insist above are sent to you in rtf and csv format Delete suspicious emails More Virus Protection Update anti virus software Change boot up settings Create rescue disks for your PC when it is virus free PCs usually boot up from floppy disk by default Write protect floppies before giving to other users Set up a sheep dip for floppies What to do if you get a virus Use anti virus software to remove virus Don't rush or panic Use rescue disks Inform other users Have a usb Security scan What are the Antivirus software options Purchase one of the well known brands such as Norton AV McAfee, AVG, ..... Download from the web Update regularly, this is usually done from the web Free Antivirus software is available from the web List of some Computer Virus Abraxas Acid Acme B Ugly B3 B-52 BA101 Back Time Bacros Bad Boy Bad Brains Bad Command Bad Guy Beast BeBe Beeper Beer Benoit Real PvP Flava Berlin Best Wishes