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Filtering Advanced: WiFi

tshark-basics | Level: Intermediate  | Total Lab Runs: 0 | Premium Lab

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WiFi is everywhere: home, work, airport, hospitals, shopping complexes and even on airplanes :) In these exercises, you will explore how to analyze Wi-Fi traffic using tshark.

Start the lab, locate the PCAP file and use tshark to answer the below questions:

Questions:


Set A:

    1. Which command can be used to show only WiFi traffic?
    2. Which command can be used only view the deauthentication packets?
    3. Which command can be used to only display WPA handshake packets?
    4. Which command can be used to only print the SSID and BSSID values for all beacon frames?


    Set B:

    1. What is BSSID of SSID “LazyArtists”?
    2. SSID “Home_Network” is operating on which channel?
    3. Which two devices received the deauth messages? State the MAC addresses of both.
    4. Which device does MAC 5c:51:88:31:a0:3b belongs to? Mention manufacturer and model number of the device.

    New to WiFi? Check our course on WiFi Pentesting.


    Set A:

      1. Protocol based filters are supported by shark siblings (wireshark and tshark). Give those a try.
      2. Every management frame in WiFi has can be classified under a type and subtype. For deauthentication frames, type is 1 and subtype is 12.  
      3. WPA handshake packets comes under Extensible Authentication Protocol over LAN (EAPoL). Already revealed a lot. :p
      4. We can filter for beacon frames then print specific fields. Now, open check which fields are those?


      Set B:

      1. Add for a filter for “LazyArtists” beacon frames and then print the BSSID field?
      2. If only there is a way for an WiFi Access Point (AP) to tell client devices about the channel it will be operating on. Wait. we do have beacon frames. :) 
      3. If we can filter specific management packets and then print a specific protocol field. Oh wait, we can do that. Can't we?
      4. We can identify the device manufacturer using first 3 octet of MAC (5c:51:88). To get more accurate information about the model number of the device, we have rely on other protocols up the OSI ladder. If you have done the HTTP traffic analysis, you already know what to do. ;)

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