A keylogger Trojan virus is exactly what it sounds like: a program that records keystrokes. The danger of a keylogger infecting your computer is that it records every keystroke you type on your keyboard, including passwords and usernames.
What is a Keylogger? What does it do?
Trojan keyloggers are installed without warning along with a regular program. Like their namesake, Trojan horse viruses don’t actually look dangerous. They are attached to regular, widely used applications.
Trojan keyloggers are sometimes also called keystroke malware, keylogger viruses, and Trojan horse keyloggers.
A keylogger monitors and logs every keystroke it can identify. It stores the information locally to share with the hacker via physical or online access.