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How Can Network Worms Infect Your Computer

How Can Network Worms Infect Your Computer

Resolutions:5 | Views:5271
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From Wikipedia, the free encyclopedia.

" A computer worm is a self-replicating computer program, similar to a computer virus. A virus attaches itself to, and becomes part of, another executable program; however, a worm is self-contained and does not need to be part of another program to propagate itself. They are often designed to exploit the file transmission capabilities found on many computers. The main difference between a computer virus and a worm is that a virus can not propagate by itself whereas worms can. A worm uses a network to send copies of itself to other systems and it does so without any intervention. In general, worms harm the network and consume bandwidth, whereas viruses infect or corrupt files on a targeted computer. Viruses generally do not affect network performance, as their malicious activities are mostly confined within the target computer itself."

This presentation was created to show how even after you completely reinstalled the operating system in order to remove a virus, you can get reinfected right away if you connect to the internet without being protected by a firewall.

What we show here mainly applies to pre Service Pack 2 computers. The difference between SP1 and SP2 is that the firewall is not enabled by default in the first. That caused the huge virus outbreaks with Sasser and MSBlaster in 2004 and that is why Microsoft created Service Pack 2.

We freshly installed Windows XP Sp1 and connected to the internet with no antivirus and without turning on the Sp1 firewall and we waited. Here's what happened:

How to enable the windows firewall in XP SP1 or XP pre SP1

1. Click Start, choose Control Panel

2. Click on Network and Internet connections, double click on Network Connections at the bottom

3. Right click on the default internet connection and choose Properties

4. Click on the top on Advanced and put a check mark in Protect my computer...

5. Click OK to apply the changes.

   Click here if this resolved your issue.

Submitted by Paul Ionescu
Last modified 2006-10-01
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