Trojans are malicious applications that pose themselves as legitimate software in order to trick users to install them. Once on the victim's machine, it may run any number of malicious process to steal vital information or inflict damage to other software.
Being run, this Trojan horse shows a message box with an animated picture and starts to change the mouse pointer cursor position every half a second, making its operation difficult or even impossible. Also the Trojan blocks several keyboard keys including ESC, CTRL, ALT, DEL and others. The Trojan installs itself to a system as SYSFILE.EXE into \Windows\System\ a folder and modifies the Registry to be run upon the next Windows startup. After reboot, working with an infected computer will be impossible.