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Computer Virus - FileDen


									Computer Virus
      What is a computer Virus?
• Is a computer program that can copy itself and
  infect a computer.
• A true virus can spread from one computer to
  another (in some form of executable code)
  when its host is taken to the target computer
    Why do people create computer
• To gain control of or hack a computer and use it
  for specific tasks.
• To generate money by using such malware as a
  cash machine
• To steal sensitive information (credit card
  numbers, passwords, personal details, data, etc.,)
• To prove that they are capable of writing a virus.
• For revenge against a company
• To cripple a computer or network
              Propagation tricks
•   LAN Connection
•   Internet Connection
•   Flash drive
•   Floppy disk
•   CD (compact disc)
•   DVD (digital video disc)
              Kinds of Viruses
•   General Viruses
•   Email Viruses
•   Trojans
•   Worms
  Four types of viruses that spread to
              the system
• Program – this type is executed from within
  specific application programs.
• Boot sector- this type enters your system through
  a floppy disc or any removable media and then
  infects the hard drive.
• Macro – this type is written specifically for macro
  applications on your computer like Microsoft
  Word, Excel and Outlook
• Email – this type spreads through email
               Virus Symptoms
•   Computer Runs Slowly
•   Random Restarts
•   Anti-viral Software disabled
•   Printing errors
•   Attachment Extensions
Anti-Virus Software
• Anti-Virus Software is used to prevent, detect
  and remove malware, including computer
  viruses, worms and Trojans.
           Anti-Virus Measure
• Preparation – includes making backups of all
  software (including operating systems) and
  making a contingency plan.
• Prevention – includes creating awareness,
  implementing hygiene rules, using
  authorization software, or providing isolated
  ‘quarantine’ PCs.
• Detection – involves the use of anti-virus
  software to detect, report and (sometimes)
  disinfect viruses.
• Containment – involves identifying and
  isolating the infected items.
• Recovery – involves disinfecting or removing
  infected items, and recovering or replacing
  corrupted data.

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