Binwalk is a built-in Python tool that is used to analyze, reverse-engineer, and extract firmware images. A lot of people who play CTFs use this tool to analyze the files they find. In this recipe, we will look at a very basic usage of binwalk.
Using Binwalk
How to do it...
Let's perform the following steps:
- We have an image file called brain.jpg, which opens like an image, as shown in the following screenshot:
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- Now, let's analyze it with binwalk. Use the following command:
binwalk brain.jpg
Once we run the preceding command, we get the following output:
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- We can see that this isn't an ordinary image: it contains a ZIP archive, which has a file called flag.txt. Let's extract the files from the image...