A disgruntled employee Robert targeted to acquire business secrets of the organization he is working in and wants to sell the same to a competing organization for financial gain. For this purpose…

A disgruntled employee Robert targeted to acquire business secrets of the organization he is working in and wants to sell the same to a competing organization for financial gain. For this purpose, he was collecting all important documents and the information from the organization and conducting business plans to discuss future business plans. To collect the information about the organization's business plans, he had built a listening device housed in his bag and arrived the meeting and readily took him to the meeting room. Robert waited until that employee left the meeting room and planted listening devices at multiple places in the room. Then he came back again, he collected all the information from the recording device. Which of the following is the type of attack being performed by Robert on the target organization?