Internet worms

  CurlyWhirly 08:45 09 Jul 2004

I have heard so much lately about internet worms like the sasser worm that seek out PC's that haven't been properly patched or kept up to date with firewall, anti-virus, etc.
What I was wondering was since a worm is really like most software and is a program how does it get executed while roaming around the internet?
What I mean is when you run a program on your PC the actual program/data instructions are executed out by your CPU so how can the program even function outside of a PC?
I am just curious!

  Molded 09:01 09 Jul 2004

Have a look at this for starters :

click here

  CurlyWhirly 09:25 09 Jul 2004

Cheers for the link to 'How Stuff Works' - this is a website that I have added to my favourites!
I now know that worms piggy back on top of genuine programs and spring to life when the genuine program is run but what I don't get is HOW they can SEARCH for vulnerable PC's to infect while roaming the internet?
A computer virus surely has some characteristics of a real virus i.e. the virus lays dormant while outside of the human body and only comes to life when INSIDE the body?
Going back to computer viruses if the virus is DORMANT then how can it search for vulnerable PC's to infect in the first place?

  Belatucadrus 11:08 09 Jul 2004
  CurlyWhirly 17:27 09 Jul 2004

Cheers BELATUCADRUS - your links proved extremely useful and I have spent a fair amount of time reading all 3 and I think I have a much better understanding now of how internet worms work!

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