Malware Fighting Spyware, Viruses, and Malware Ch 1 -3.

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Presentation transcript:

Malware Fighting Spyware, Viruses, and Malware Ch 1 -3

Malware Malicious software –Causes symptoms like: New things appear on your screen New toolbars appear in your browser Your machine runs slowly, or crashes Your home page resets –It can also make your machine a Zombie, controlled by criminals and used for crimes

Spyware Gathers information about you –Targeted advertising –Collecting passwords Installed on your machine by –Clicking on links –Opening attachments to or Instant Messages –Just by opening Web pages (drive-by download)

Cookies Cookies mark your machine so a Web server knows who you are –Usually useful and safe, used by online and shopping sites –Easily controlled by antispyware software like Windows Defender, Spybot, or AdAware –Not a major threat

Extra Web Pages Pop-ups and pop-unders –Little ads that appear on top of, or under, other Web pages One-pixel Web pages –Show up on toolbar but nowhere else –Used as a gateway to install other nasty things on your machine

Toolbars Sometimes useful, but use up screen space and may be accompanied by other malware

Zombies Machines controlled by criminals Used to send spam, or perform attacks on Web sites –See links CNIT 30 1c – 1f on my Web page samsclass.info

Spam Unsolicited –Scams -- get-rich offers, messages from banks, etc. –Click on links or opening attachments, malware gets on your computer

Spim Instant message spam –See links CNIT 30 1g & 1h –Image from microsoft.com

Viruses Viruses reproduce and spread from one computer to another –If you get infected, your machine can harm other machines –ALWAYS RUN ANTIVIRUS SOFTWARE McAfee is free to CCSF students (Link 1i & j) AVG is free to everyone (Link 1k) Norton is popular (Link 1l) Panda is reportedly the best (Link 1m)

Worms v. Viruses Viruses are attached to files, or in a boot sector on a hard disk Worms travel through a network, often by –They both spread and are very dangerous

Trojan Horses or Trojans A file that claims to do one thing, but actually does something else –Keystroke logger -- collects passwords and other personal data –Remote-controls your computer, making it a Zombie

Blended Threats Combine many forms of attack Very dangerous, and common