User manual

Viruses and more
Avira Professional Security - User Manual (Status: 14 Dec. 2012) 85
Backdoors
A backdoor can gain access to a computer by bypassing the computer access security
mechanisms.
A program that is being executed in the background generally enables the attacker almost
unlimited rights. User's personal data can be spied with the backdoor's help.. But are
mainly used to install further computer viruses or worms on the relevant system.
Boot viruses
The boot or master boot sector of hard disks is mainly infected by boot sector viruses.
They overwrite important information necessary for the system execution. One of the
awkward consequences: the computer system cannot be loaded any more…
Bot-Net
A bot-net is defined as a remote network of PCs (on the Internet) that is composed of bots
that communicate with each other. A bot-net can comprise a collection of cracked
machines running programs (usually referred to as worms, Trojans) under a common
command and control infrastructure. Bot-nets serve various purposes, including denial-of-
service attacks etc., usually without the affected PC user's knowledge. The main potential
of bot-nets is that the networks can achieve grow to thousands of computers and their total
bandwidth exceeds most conventional Internet accesses.
Exploit
An exploit (security gap) is a computer program or script that takes advantage of a bug,
glitch or vulnerability leading to privilege escalation or denial of service on a computer
system. One form of exploitation for example is an attack from the Internet with the help of
manipulated data packages. Programs can be infiltrated in order to obtain higher access.
Fraudulent software
Also known as "scareware" or "rogueware", it is a fraudulent software that pretends that
your computer is infected by viruses or malware. This software looks deceptively similar to
professional Antivirus software but is meant to raise uncertainty or to scare the user. Its
purpose is to make the victims feel threatened of imminent (unreal) danger and to make
them pay to eliminate it. There are also cases when the victims are lead to believe they
were attacked and they are instructed to carry out an action, which in reality is the real
attack.