Wednesday, 9 January 2019

Virus Damage Scenarious in OS Security

Virus
  • Blackmail
  • Denial of service as long as virus runs
  • Permanently damage hardware
  • Target a competitor's computer
            - Do harm
            - Espionage
  • Intra-corporate dirty tricks
            - Practical joke
            - Sabotage another corporate officer's files

Worms vs Viruses
  • Viruses require other programs to run
  • Worms are self-running (separate process)
  • The 1988 Internet Worm
            - Consisted of two programs
                   Bootstrap to upload worm
                   The worm itself
            - Exploited bugs in sendmail and finger
            - Worm first hid its existence
            - Next replicated itself on new machines
            - Brought the Internet (1988 version) to a screeching halt.


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