> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/hacking-wifi/wpa-wpa2-psk-network-attacks/packet-analysis/association-request-packet-analysis.md).

# Association Request Packet Analysis

Analyze association request packets in an authorized wireless capture.

An association request is sent by a client when joining an access point. This page shows how to identify these packets and list the client MAC addresses in a capture.

Analyze captures from networks you own or are authorized to assess.

### Filter association requests

The filter `wlan.fc.type_subtype == 0` returns **association requests**. It does not return probe requests:

{% code overflow="wrap" %}

```bash
tshark -r CAPTURE-01.cap -Y "wlan.fc.type_subtype==0" 2>/dev/null
```

{% endcode %}

> 2539 11.827060 9e:8c:fb:49:d4:52 → TpLinkTechno\_62:45:e7 802.11 160 Association Request, SN=3067, FN=0, Flags=........, SSID="ATIC2"\
> 2541 11.831747 9e:8c:fb:49:d4:52 → TpLinkTechno\_62:45:e7 802.11 160 Association Request, SN=3067, FN=0, Flags=....R..., SSID="ATIC2"\
> 2546 11.846464 9e:8c:fb:49:d4:52 → TpLinkTechno\_62:45:e7 802.11 160 Association Request, SN=3067, FN=0, Flags=....R..., SSID="ATIC2"\
> 2582 11.940395 9e:8c:fb:49:d4:52 → TpLinkTechno\_62:45:e7 802.11 160 Association Request, SN=3070, FN=0, Flags=....R..., SSID="ATIC2"\
> 2585 11.945362 9e:8c:fb:49:d4:52 → TpLinkTechno\_62:45:e7 802.11 160 Association Request, SN=3070, FN=0, Flags=....R..., SSID="ATIC2"\
> 2590 11.961791 9e:8c:fb:49:d4:52 → TpLinkTechno\_62:45:e7 802.11 160 Association Request, SN=3070, FN=0, Flags=....R..., SSID="ATIC2"\
> 3533 22.271900 9e:8c:fb:49:d4:52 → TpLinkTechno\_62:45:e7 802.11 160 Association Request, SN=328, FN=0, Flags=........, SSID="ATIC2"\
> 17505 97.427531 8e:60:c4:67:1c:9f → TpLinkTechno\_62:45:e7 802.11 160 Association Request, SN=2458, FN=0, Flags=........, SSID="ATIC2"\
> 17930 98.859721 8e:60:c4:67:1c:9f → TpLinkTechno\_62:45:e7 802.11 160 Association Request, SN=1208, FN=0, Flags=........, SSID="ATIC2"\
> 20307 107.283060 8e:60:c4:67:1c:9f → TpLinkTechno\_62:45:e7 802.11 160 Association Request, SN=3937, FN=0, Flags=........, SSID="ATIC2"\
> 22489 116.717916 9e:8c:fb:49:d4:52 → TpLinkTechno\_62:45:e7 802.11 160 Association Request, SN=881, FN=0, Flags=........, SSID="ATIC2"

<figure><img src="https://131707722-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2FqqYpjrNfCLytkTAy7okx%2F%7BD18AEEC5-2993-4D88-85C8-69DE6CE2EB6F%7D.png?alt=media&amp;token=440bbc50-fd9c-4779-87ff-fec9aa21855d" alt=""><figcaption></figcaption></figure>

The output shows clients sending association requests to the access point. The `SSID` field identifies the network requested by each client.

### List client MAC addresses

Extract the source address from the association requests. The following command returns each client MAC address once:

{% code overflow="wrap" %}

```bash
tshark -r CAPTURE-01.cap -Y "wlan.fc.type_subtype==0" -T fields -e wlan.sa 2>/dev/null | sort -u
```

{% endcode %}

<figure><img src="https://131707722-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2FeOvZr0ahwSIsGVRiReUW%2F%7B703EA628-4976-4B61-9813-8D3FB06276EC%7D.png?alt=media&amp;token=2b75bda0-b50a-413c-b3cd-89bdda54c16a" alt=""><figcaption></figcaption></figure>


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