Just for fun, and to write a little bit about binwalk, one of the best tools for this job! What is binwalk?īinwalk is an open-source tool for analyzing, reverse engineering and extracting firmware images.Ĭreated in 2010 by Craig Heffner, binwalk is able to scan a firmware image and search for file signatures to identify and extract filesystem images, executable code, compressed archives, bootloader and kernel images, file formats like JPEGs and PDFs, and many more! When installing and configuring OpenWRT, I also downloaded the last version of the Archer C7 official firmware image provided by TP-Link and decided to analyze it. I prefer to trust on a well maintained and open-source software project like OpenWRT. Why? Because the manufacturer’s firmware quality is usually bad, are not maintained over time and is insecure, with many bugs waiting to be exploited. One thing I always do when I buy a new router is install OpenWRT. Not one of the best, but good enough for my needs. I’ve bought the TP-Link Archer C7 home router. A few days ago I decided to reverse engineer my router’s firmware image with binwalk.
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