The ornamental design for a universal serial bus apparatus, as shown and described.
FIG. 1 is a top view;
FIG. 2 is a left end view;
FIG. 3 is a right end view;
FIG. 4 is a left side view;
FIG. 5 is a bottom view;
FIG. 6 is a right side view; and,
FIG. 7 is a perspective view.