MyDoom.BC appeared on February 18th, 2005. It is a minor variant of MyDoom.BB. MyDoom.BC adds a few new sites from which the worm attempts to download the additional Backdoor (Backdoor.Win32.Surila.o). Mydoom.BB
Allow F-Secure Anti-Virus to disinfect the relevant files.
For more general information on disinfection, please see Removal Instructions.