Viruses and Worms

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9 Terms

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Virus

  • Malware that reproduces itself

  • Invisible / Visible

Resolution

  • Anti-virus

    • Keep signature file updated

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Virus Types

  • Program Viruses

  • Boot Sector Viruses

  • Script Viruses

  • Macro Viruses

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Program Viruses

  • Part of an app

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Boot Sector Viruses

  • Virus runs upon bootup

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Script Viruses

  • OS and Browser baked

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Macro Viruses

  • Common in Microsoft office

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Fileless Virus

  • Operates in memory (not in file / app)

    • Avoids Ant-virus

Ex:

  • Malicious link exploiting website vulnerabilities

  • Launches PowerShell downloads more scripts

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Worms

Self-replicating and spreads quickly

Solution:

  • Firewalls and IDP helps mitigate

    • Have to be aware of type of worm

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Wannacra Worm

  • Infected PC and found all vulnerable systems

  • Then held them hostage with ransomware

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