A Steganography-based Covert Keylogger

Identity theft through keyloggers has become very popular the last years. One of the most common ways to intercept and steal victim’s data are to use a keylogger that transfers data back to the attacker. Covert keyloggers exist either as hardware or software. In the former case they are introduced as devices that can be attached to a computer (e.g. USB sticks), while in the latter case they try to stay invisible and undetectable as a software in the operating system. Writing a static keylogger which operates locally in victim’s machine is not very complex. In contrast, the creation of covert communication between the attacker and the victim and still remain undetectable is more sophisticated.

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