Hak5 LAN Turtle

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Summary

The Lan turtle is an tool for Penetration testers and Systems Admins disguised as an simple USB Ethernet adapter.

Use Cases

LAN Turtle and Field Guide

The use cases may differ between the user groups.

Penetration users can use it for:

  • Network scanning with nmap
  • DNS spoofing clients
  • Monitoring Browser Connections

Sysadmin may us it to:

  • Access the LAN from an remote location with an VPN tunnel
  • Send periodical status reports via email or https

Description

Setting up the LAN Turtle

  1. Start by plugging the turtle into a by you controlled computer.
  2. Your computer will get an 172.16.84.x address as soon as the startup sequence of the turtle finished
  3. Connect to it with ssh root@172.16.84.1 and enter the password sh3lls
  4. The simplistic graphical shell interface will prompt you to change the password but the old one is also allowed.
  5. Then the LAN turtle can be configured and modules can be installed in the interface.
  6. If you end the interface you will be greeted with an normal Linux shell but you can open it again with the turtle command

Using the Turtle modules

The LAN Turtle comes packed with pre-installed tool. Furthermore it is possible to program your own or download them from the internet and configure them with the module manager as well.

LAN Turtle configuration shell interface

Auto ssh

Auto ssh opens an secure shell and keep it alive as long as u want. Before the usage can start you need to generate RSA keypairs via the key manager module. After configuring the auto ssh module you will be able to access the LAN Turtle form the public server at port 2222.

Cron

With the cron module you can access and modify the cron tab even simpler than usual. The Cron Tab allows you to schedule time driven shell commands.

Meterpreter

This module deploys an persistent shell to the Metasploit Framework of an other Machine.

OpenVPN

With the OpenVPN module you will be able to create an OpenVPN gateway device which allows you to send the captured data to your operating Network.

SSHFS

SSHFS mounts the filesystem of an remote device via ssh.

namp-scan

This module uses nmap for discovering running devices and their port of the current LAN network.

urlsnarf

URL Snarf allows you to capture which websites were accessed by the plugged in computer. URL Snarf only works with http webpages which are hard to find today.

Creating an Network discovery device with the LAN Turtle

For example project we use the following modules:

  • Cron Job
  • sshfs
  • nmap-scan

Step 1: Configure sshfs

  1. Access the sshfs module via the module manager
  2. Go to the configure tab and insert
    1. Host: IP address of the remote server
    2. Port: 22
    3. User: the username
    4. Path: This can be left blank if you want to use the users home directory
  3. Start ssfs and enable it for start up

Step 2: nmap-scan

  1. Access the nmap-scan module via the module manager
  2. Go to the configure tab and insert
    1. target: 192.168.0.1-255 (This may differ for our network)
    2. logflie: /sshfs/
    3. use the desired attack profile
    4. save the configuration with execute

Step 3: cron job

  1. add in the con config */15 * * * * start nmap-scan

This line start an nmap-scan every 15 minutes.

Used Hardware

LAN Turtle

References