BackDoor-EXI is a Trojan that downloads harmful files onto compromised computers. BackDoor-EXI will also give an attacker remote access to a compromised system. BackDoor-EXI may come with keylogger functionality in order to capture a victim's keystrokes and harvest private data such as passwords or credit card numbers. To ensure that it is automatically executed with every system start-up, BackDoor-EXI will create a special registry entry. Once an attacker has access to a system he/she may spy on a victim's activities, install malicious software and take control of the system.