For the enforcement of this act or any rule and regulation issued under the authority thereof the department is hereby empowered, and it shall be its duty, to conduct such periodic spot checks and investigations as will disclose with reasonable certainty whether or not compensation benefits have been paid to persons not legally entitled thereto or as will disclose violations of this act and to take such steps and adopt such means as may reasonably be necessary to enforce the provisions of this act. The conduct of such spot checks and investigations and all legal proceedings arising therefrom shall be under the supervision and direction of the Attorney General of the Commonwealth, and the expenses thereof and in connection therewith are hereby declared to be administrative expenses to be paid from the Administrative Fund.