firmwalker

A simple bash script for searching the extracted or mounted firmware file system.

It will search through the extracted or mounted firmware file system for things of interest such as:

• etc/shadow and etc/passwd
• list out the etc/ssl directory
• search for SSL related files such as .pem, .crt, etc.
• search for configuration files
• look for script files
• search for other .bin files
• look for keywords such as admin, password, remote, etc.
• search for common web servers used on IoT devices
• search for common binaries such as ssh, tftp, dropbear, etc.
• search for URLs, email addresses, and IP addresses
• Experimental support for making calls to the Shodan API using the Shodan CLI

Download

git clone https://github.com/craigz28/firmwalker.git

Usage

• If you wish to use the static code analysis portion of the script, please install eslint: npm i -g eslint

• ./firmwalker {path to root file system} {path for firmwalker.txt}

• Example:

  ./firmwalker linksys/fmk/rootfs ../firmwalker.txt

• A file firmwalker.txt will be created in the same directory as the script file unless you specify a different filename as the second argument
• Do not put the firmwalker.sh file inside the directory to be searched, this will cause the script to search itself and the file it is creating
• chmod 0700 firmwalker.sh

How to extend

• Have a look under ‘data’ where the checks live or add eslint rules – http://eslint.org/docs/rules/ to eslintrc.json

Copyright (C) 2016  craigz28

Source: https://github.com/craigz28/