ECSA v10: EC-Council Certified Security Analyst v10

A disgruntled employee, Robert, aims to obtain the business secrets of the organization where he works and sell them to a competing organization for financial gain. He began gathering information about the organization and learned that it was holding a meeting to discuss future business plans. To obtain information about those plans, he built a listening device concealed in his bag and arrived at the meeting location wearing a suit and tie. An employee believed he was a senior executive from another branch attending the meeting and willingly escorted him to the meeting room. Robert waited until that employee left the room, then planted listening devices in multiple locations. He then went outside the building, listened to, and recorded all conversations from the meeting.

Identify the type of attack Robert is performing against the target organization?