Is your computer spying on you?
By George Kocke
Network Administrator, Visitation of Our Lady School
What are adware and spyware?
Adware and spyware are types of data-collecting software designed
to monitor or spy on your computing activities. Adware and spyware
use your computer's memory and hard drive space. In doing so,
they drastically reduce the performance of your computer. Computers
infested with adware and spyware typically have many more than
just a single instance of such software sapping valuable system
resources.
In addition to slowing up your computer, spyware causes unnecessary
traffic on the local area network as well as the wide area network
which means that spyware makes the internet slower for everyone
on the Archdiocesan network. Spyware and misconfigured PC's constitute
30-40 per cent of all internet traffic at the Archdiocese.
Adware programs mainly monitor your web browsing and search habits
and send the collected information to online marketing and advertising
firms. These firms then send both browser-based and stand-alone
popup ads to your computer and share your information with other
such firms. Most adware programs are installed on a computer by
and with the knowledge of users.
Some spyware is also used for advertising purposes, but spyware
is typically much more malicious than adware. Spyware is usually
installed on a computer without the knowledge or consent of users.
In addition to monitoring your web browsing and search habits,
spyware can scan files on a hard drive or network, install other
malicious programs, monitor keystrokes, collect credit card and
online banking information, change a web browser's default home
page and perform many other undesirable activities.
How are these programs installed?
Adware is usually installed by and with the knowledge of the
user. Adware is frequently bundled with free (not related to free
software such as Linux, Mozilla, Firefox, OpenOffice, etc.) or
shareware programs downloaded from the Internet. Games, screensavers,
weather monitoring programs, peer-to-peer file swapping programs
and other "useful" or "cute" programs often
come bundled with adware. These programs usually won't work without
the installation of the bundled adware. Many websites offering
such programs clearly state that they are bundled with adware
while other websites hide the information deep into the license
agreement.
During the installation of such programs, the user is usually
presented with a dialog box and "license agreement"
stating that the adware will be installed. Most users don't read
these dialog boxes or the terms of the "license agreement"
and quickly click the "next" or "install"
buttons.
Spyware is almost always installed without the knowledge or consent
of the user. Some spyware is installed through the exploitation
of security holes or features (ActiveX) of Microsoft's Internet
Explorer web browser. Simply looking at certain web sites can
cause the installation of spyware. Spyware can also be installed
by merely clicking on links in email or clicking on an email attachment.
Preventing the installation of adware and spyware
Preventing the installation of most adware is actually fairly
easy. Users must get into the habit of reading the license agreements
and dialog boxes presented to them during the installation of
software downloaded from the Internet.
If a program's web site or installation routine states that the
program is bundled with adware, don't install it!
Preventing the installation of spyware installed by running an
email attachment is also easy. The solution in this case is to
simply not click on or save the attachment unless you know who
the sender is and the exact purpose of the attachment. Be wary
of people (even friends or relatives) sending email with "cute"
or "funny" email attachments. In addition, be very careful
when clicking on links in email. You should also consider using
an email client other than Microsoft Outlook or Outlook Express
as these programs are riddled with security holes and are well
known for being responsible for the spread of email based viruses
and worms.
The best way to prevent the installation of spyware is to stop
using Microsoft's Internet Explorer (IE) as your web browser.
IE is a conduit for spyware and other malicious programs to be
installed on a computer. New security holes and exploits are discovered
in IE on a weekly basis and Microsoft is very slow to fix such
problems. Computer security experts have long warned of the dangers
of IE. Because of the huge number of IE security problems, the
US Department of Homeland Security issued a recommendation in
July of 2004 that users switch to a more secure web browser.
Unfortunately, IE can't be removed from your computer since Microsoft
has made it an integral part of the Windows operating system and
is needed to install updates. However, you can start using an
alternative browser to minimize your risks.
The two most common alternative web browsers are Firefox and Mozilla,
both made by the Mozilla Foundation. Both Firefox and Mozilla
use the same core browsing software. Firefox is simply a web browser.
It has no other purpose than to let you look at websites. Mozilla
is a collection of programs (suite) including the browser, an
email client and a web page editor (Composer). Download and install
whatever fits your needs.
Both Firefox and Mozilla will prevent almost all browser based
spyware installations from taking place. Both also have a built
in popup blocker and a adblock module that can be download that
will help save your sanity. There is no need to worry about losing
your bookmarks or "favorites" as both Firefox and Mozilla
will import them from IE.
If you don't want to stop using IE, please be sure to frequently
run Windows Update or turn on automatic updates. Even though Microsoft
is slow to respond to IE security problems, keeping Windows updated
with the latest fixes will slightly reduce the risk of IE-based
spyware installation.
Getting rid of adware and spyware
Preventing the installation of adware and spyware in the first
place is best, but many computers already have such software installed.
There are several solutions to this problem.
While adware and spyware are not computer viruses or worms, some
antivirus software manufactures are starting to include adware
and spyware removal tools with their software. Even if your antivirus
software does not detect adware and spyware, please make sure
your antivirus software is up-to-date.
There are a number of programs that can be downloaded for free
(spybot can be downloaded from ftp://archdiocese-no.org/spybotsd13.exe)
for personal use or for a fee for corporate or educational use
that will attempt to remove adware and spyware from computers.
It may take the installation of more than one program to remove
adware and spyware from a computer. In some cases, no removal
programs will rid a computer of adware and spyware. Please be
aware that some spyware removal programs are themselves spyware!
Some computers may be so infested with adware and spyware that
the only solution is to backup any important files, wipe the hard
drive and reinstall the operating system. In such cases, the immediate
installation of all operating system updates is crucial as the
installation media may be several years old.
In addition, it is highly recommended to install an alternative
web browser and email client as soon as possible. If you are not
familiar with the installation of a computer operating system,
it is advisable that you allow a professional to do this for you.
Resources
US
Homeland Security warning on Internet Explorer
Firefox and Mozilla
Adware and spyware removal:
Ad-aware
Spybot
Spyware/AdWare/Malware
FAQ and Removal Guide
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