System information

22 Kaspersky Internet Security 2009
TYPE
NAME
DESCRIPTION
Trojans
Trojans
Trojans include the following malicious
programs:
 classic Trojan programs; they
perform only major functions of Trojan
programs: blocking, modification or
erasing of data, disruption of the
operation of the computers or computer
networks; they do not have any
additional functions characteristic of
other types of Trojan programs
described in this table;
 "multi-purpose" Trojan programs; they
have additional functions characteristic
of several types of Trojan programs.
Trojans-
Ransoms
Trojan programs
requiring a ransom
They "take hostage" information on the
user's computer, modifying or blocking it
or disrupt the operation of the computer
so that the user would be unable to use
the data. Then the intruder demands a
ransom from the user in exchange to the
promise to send the program that will
restore the computer's operability.
Trojans-
Clickers
Trojan-Clickers
These programs access web pages from
the user's computer: they send a
command to the web browser or replace
web addresses stored in the system files.
Using these programs the intruders
arrange network attacks and increase the
traffic to such sites to increase the rate of
displaying ad banners.
Trojans-
Downloader
s
Trojan programs-
downloaders
They access the intruder's web page,
download from it other malware programs
and install them on the user's computer;
they can store the name of the
downloadable malware program filename
in themselves or receive it from the web
page they access.