https://bitfragment.com/categories/tutorials/ Recent content in Tutorials on BITFRAGMENT Hugo -- gohugo.io en-us <a href="https://creativecommons.org/licenses/by-nc/4.0/" target="_blank" rel="noopener">CC BY-NC 4.0</a> Tue, 04 Aug 2020 02:24:16 +0100 https://bitfragment.com/posts/ctf-methodology-steganography/ Tue, 04 Aug 2020 02:24:16 +0100 https://bitfragment.com/posts/ctf-methodology-steganography/ always run strings filename first and try to grep for the flag format for a quick easy win; try running binwalk filename to see if there are any files embedded in the image. You can find from text files, to other images, to whole archives. Note that for PNG files it is normal to contain two zlib compressed data entries; if you find any hidden data by running binwalk, run foremost filename to extract said data from the image; run steghide info filename to display info about whether the file has any embedded data.