Back Construction is a virus usually caught through emails or file and print sharing. This Trojan allows an unauthorized user to connect to your computer via a remote administration tool. With this, the unauthorized user may retrieve and install additional files to your PC without your knowledge, and capture your cached passwords. The unauthorized user may also able to use your Internet chat program, your email program, control your system's shutdown/reboot/log-off options, and close your applications.
cmctl32.exe