This virus infects COM files during DIR commands. It activates on the 1st of any month, displaying garbage and trying to overwrite the command interpreter.
Shatin contains this text:
Made in Hong Kong (Shatin)
Allow F-Secure Anti-Virus to disinfect the relevant files.
For more general information on disinfection, please see Removal Instructions.
Description Created: Mikko Hypponen, F-Secure