Keylogger Trojan

Keylogger Trojan is a malicious program that steals your user name and password and logging them to a file and send to the attackers. Some keyloggers are available in the market for buying. They are generally used by the parents to track the online activities of their children and also by the people who want to track the contacts and online activities of their life partner. Some keyloggers are capable of monitering your web browser. If a desired responce is found it tracks the required information and sent to the remote attacker. The desired responce may be the opening of a site of the bank in which you may have a account. Some sites requires pointing by mouse rather than the keystrokes. This reduces some of the attack. But some trojans send the screenshot of the victims application to the remote attacker.
The keyloggers are installed in the victim's machine by making him belive that they are useful software. The most of the infection are through the P to P network.
To avoid the infection connect only to trusted network. Download softwares only from trusted sources. Use an updated Antivirus software and install a firewall.