{% hint style="success" %} Learn & practice AWS Hacking:[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)\ Learn & practice GCP Hacking: [**HackTricks Training GCP Red Team Expert (GRTE)**](https://training.hacktricks.xyz/courses/grte)
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{% endhint %} # 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_: ![](<../../../.gitbook/assets/image (424).png>) ![](<../../../.gitbook/assets/image (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 file.pcap ``` For example it will retrieve the WPA passphrase protecting a PSK (pre shared-key), that will be required to decrypt the trafic later. # 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 `, 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== && (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 ![](<../../../.gitbook/assets/image (426).png>) {% hint style="success" %} Learn & practice AWS Hacking:[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)\ Learn & practice GCP Hacking: [**HackTricks Training GCP Red Team Expert (GRTE)**](https://training.hacktricks.xyz/courses/grte)
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{% endhint %}