# Wifi Pcap Analysis

<details>

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## Check BSSIDs

When you receive a capture whose principal traffic is Wifi using WireShark you can start investigating all the SSIDs of the capture with *Wireless --> WLAN Traffic*:

![](https://github.com/nirugima/hacktricks/blob/main/.gitbook/assets/image%20\(424\).png)

![](https://github.com/nirugima/hacktricks/blob/main/.gitbook/assets/image%20\(425\).png)

### Brute Force

One of the columns of that screen indicates if **any authentication was found inside the pcap**. If that is the case you can try to Brute force it using `aircrack-ng`:

```bash
aircrack-ng -w pwds-file.txt -b <BSSID> file.pcap
```

## Data in Beacons / Side Channel

If you suspect that **data is being leaked inside beacons of a Wifi network** you can check the beacons of the network using a filter like the following one: `wlan contains <NAMEofNETWORK>`, or `wlan.ssid == "NAMEofNETWORK"` search inside the filtered packets for suspicious strings.

## Find Unknown MAC Addresses in A Wifi Network

The following link will be useful to find the **machines sending data inside a Wifi Network**:

* `((wlan.ta == e8:de:27:16:70:c9) && !(wlan.fc == 0x8000)) && !(wlan.fc.type_subtype == 0x0005) && !(wlan.fc.type_subtype ==0x0004) && !(wlan.addr==ff:ff:ff:ff:ff:ff) && wlan.fc.type==2`

If you already know **MAC addresses you can remove them from the output** adding checks like this one: `&& !(wlan.addr==5c:51:88:31:a0:3b)`

Once you have detected **unknown MAC** addresses communicating inside the network you can use **filters** like the following one: `wlan.addr==<MAC address> && (ftp || http || ssh || telnet)` to filter its traffic. Note that ftp/http/ssh/telnet filters are useful if you have decrypted the traffic.

## Decrypt Traffic

Edit --> Preferences --> Protocols --> IEEE 802.11--> Edit

![](https://github.com/nirugima/hacktricks/blob/main/.gitbook/assets/image%20\(426\).png)

<details>

<summary>📝<a href="https://www.twitch.tv/hacktricks_live/schedule"> </a><mark style="color:blue;"><strong>Breached Write Content</strong></mark><strong> Wednesdays</strong></summary>

* Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
* Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
* Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
* **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.**
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</details>


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