Class
Backdoor
Platform
Win32

Parent class: TrojWare

Trojans are malicious programs that perform actions which are not authorized by the user: they delete, block, modify or copy data, and they disrupt the performance of computers or computer networks. Unlike viruses and worms, the threats that fall into this category are unable to make copies of themselves or self-replicate. Trojans are classified according to the type of action they perform on an infected computer.

Class: Backdoor

Backdoors are designed to give malicious users remote control over an infected computer. In terms of functionality, Backdoors are similar to many administration systems designed and distributed by software developers. These types of malicious programs make it possible to do anything the author wants on the infected computer: send and receive files, launch files or delete them, display messages, delete data, reboot the computer, etc. The programs in this category are often used in order to unite a group of victim computers and form a botnet or zombie network. This gives malicious users centralized control over an army of infected computers which can then be used for criminal purposes. There is also a group of Backdoors which are capable of spreading via networks and infecting other computers as Net-Worms do. The difference is that such Backdoors do not spread automatically (as Net-Worms do), but only upon a special “command” from the malicious user that controls them.

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Platform: Win32

Win32 is an API on Windows NT-based operating systems (Windows XP, Windows 7, etc.) that supports execution of 32-bit applications. One of the most widespread programming platforms in the world.

Description

Technical Details

Backdoor.CyberSpy is a malicious program which portrays itself as a telnet-server. It informs its creator about the presence of networks via either e-mail or ICQ and contains a component allowing it to make adjustments.

Upon execution of this program the virus copies itself into the Windows system directory and registers itself in the system registry so that it will start each time an infected system is rebooted. Once this is done it sends a notice via e-mail or ICQ (according to settings made by its author), and then begins to listen to a given TCP/IP port clandestinely. Having received the message sent back by the virus (information about specific networks sent back by the virus via ICQ or e-mail), the hacker controlling Backdoor.CyberSpy, with the help of any telnet-client, gains access to a victim computer's command line (prompt).

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