Key loggers are often used for various nefarious purposes, usually to extract data from the victim's keystrokes. This can provide information on a variety of sensitive subjects, like bank account details and important passwords. A black hat hacker can use a multitude of different applications in order to accomplish this task. Four I tried today are Advanced Key logger, Spytector, Powered Key logger, and Keyprowler.
Advanced key logger was the first key logger I tried. The user interface and installation is simple and straightforward, and is well hidden to prying eyes. In fact, one must press a certain key combination (Ctrl + Shift + Alt + R) in order to access options. Otherwise, it is near impossible to detect.
Next, I tried Powered Key logger. This application is developed by the same company as Advanced, but is more "lean" - it lacks hidden options and advanced recording techniques. While the idea looked promising, it failed to install on my virtual machine, even after multiple tries. As such, it is difficult to recommend.
Afterward, I tried Spytector. Spytector offers additional features and skins, such as connection to email clients to automatically log and send keystrokes. This makes Spytector ideal for remote access attacks, as it only requires one-time access to the machine. As such, it can be recommended for certain applications, while it does not contain decent tools for hiding the application itself.
Lastly, I tried Keyprowler. Like Advanced, it remains hidden until a keypress is detected (Ctrl + Shift + K), and does one better by adding password authentication into the mix. Additionally, you can set the application to start on startup, and run invisibly. It also seems to include Spytector's best features, like scheduled screenshots, as well as automatic logs to an email address. As such, keyprowler appears to be the best, although it does cost money after a 7 day free trial.
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