With Cyber-attacks and cyber-threats are increasing, network security needs to be seen in a new dimension. WLANs (Wireless Local Area Networks) are acquiring their hold in all the verticals of life. As technology is growing, a data breach at any scale, whether at the industry level or private can be menacing to distinct. Man-in-the-Middle is one of the most ruinous attacks in the WLAN. In this work, I propose a solution to detect Man-in-the-Middle attack in public or home WLANs. The objective of the work is to present a solution which allows individual to keep watch on WLAN based on data packets collected over the network and evaluating its behavior. The proposed detection system is simulated with the help of Kali Linux where the attacker is trying to get a WPA Handshake over the network, a packet sniffer tool which captures the changes over the network during the simulation and one capture analyzing tool which analyze the capture.