Hola,
Hay una alta probabilidad de que se trate de un virus:
Cita: Shell Scrap Object is part of the Microsoft embed objects inside objects philosophy. Basically, what happens is that the shell script is wrapped around an object and the .SHS extension (which normally can't be seen even with extensions turned on) is added to the file. An .SHS file is really potentially quite dangerous because it can have anything executable in it along with a vast collection of dangerous script code in the wrapper. At least one worm uses the Shell Script object.
Saludos,