System information

30 Kaspersky Internet Security 2009
 They are also installed by intruders. For example they include such
programs in packages with other malware programs, using
"vulnerabilities" of the web browser, or Trojan downloaders and
droppers, when the user visits an "infected" website.
ADWARE
Subcategory: Adware
Severity level: medium
Adware programs involve display of advertising information to the user. They
display ad banners in another program's interface, and redirect search queries to
advertising websites. Some adware programs collect, and send to their
developer, marketing information about the user: for example, which sites they
visit, or which search requests they make. Unlike Trojan spies, this information is
transferred with the user's permission.
PORNWARE
Subcategory: Pornware
Severity level: medium
Usually, users install such programs themselves, to search for or download
pornographic information.
Intruders can also install these programs on the user's computer to display ads
for commercial pornographic sites and services to the user, without the user’s
permission. To be installed, they use vulnerabilities of the operating system or
web browser, and are generally distributed by Trojan downloaders and Trojan
droppers.
There are three types of pornware programs, as categorized in the table below.