packetsquirrel-payloads/payloads/general/AirBridge

AirBridge

Author: 0i41E

AirBridge is a payload designed for the Packet Squirrel MK II in combination with Hak5's MK7AC Module, or similar WiFi adapters. It is meant to help users to overcome a potential airgapped network, by utilizing the WiFi adapter to connect to a nearby Station.

Since it'll start the SSH service, as well as the Web interface, users can then interact with the Squirrel as usual. C2 access or connection to a VPN are also possible afterwards.

Preperation

Before deploying the Squirrel as also the payload, the user has to update the system and install usb_modeswitch, as without it, the WiFi adpater will be identified as storage. For this step, internet access is required. opkg update && opkg install usb-modeswitch

Apart from this step, the payload needs to be configured. Input the desired SSID, as well as its PASSPHRASE. Optionally, the EXTERNAL_HOST may be changed from Googles DNS server to a different system. The users C2 instance may be a good alternative, if used. NETMODE can be configured to the users needs.

SSID="<SSID>" # Station SSID
PASSPHRASE="<Passphrase>" # Passphrase
EXTERNAL_HOST="8.8.8.8" # External Host to verify connection

The last step is obvious, but should be mentioned... Prepare a Station, reachable by the AC Module.

Usage

After saving the payload, put the switch into the correct position and power up the device. After successfully booting, a blinking LED in the color magenta, will indicate the Squirrel being ready to proceed.

Plug in your WiFi adapter via USB-A and press the button. This method was implemented intentionally, as during testing it caused problems to power up the device with the AC Module already attached.

The LED will start blinking green. A solid green LED will indicate the success. Otherwise, a red LED will appear.

If everything went well, you should now be able to access the Squirrel by whatever IP-Address your Station gave to the Squirrel.