TROMMEL

TROMMEL sifts through embedded device files to identify potential vulnerable indicators.

TROMMEL identifies the following indicators related to:

• Secure Shell (SSH) key files
• Secure Socket Layer (SSL) key files
• Internet Protocol (IP) addresses
• Uniform Resource Locator (URL)
• email addresses
• shell scripts
• web server binaries
• configuration files
• database files
• specific binaries files (i.e. Dropbear, BusyBox, etc.)
• shared object library files
• web application scripting variables, and
• Android application package (APK) file permissions.

Dependencies

• Python-Magic
• Pyfiglet

Usage

TROMMEL help menu.

$ trommel.py --help

Output TROMMEL results to a specific file and a specific directory based on a given root file system directory.

$ trommel.py -p <root file system directory> -o results_output_file -d <directory to save results output file>

Notes

• Red Team point of view: researchers during firmware analysis to find potential vulnerabilities
• Blue Team point of view: Network defenders can benefit as well to assess devices on their network or for devices they plan to add to their network
• Devices can include IoT (web cams, smart devices (light bulbs, plugs, switches, TVs, fridge, coffee maker, etc.)), SCADA/ICS, routers, really anything with an embedded flash chip that boots an OS (or like an OS) on startup.
• TROMMEL has been tested using Python3 on Kali Linux x86_64.

References

• Firmwalker
• Lua Code: Security Overview and Practical Approaches to Static Analysis by Andrei Costin