File Size : 42 kB File Modification Date/Time : 2020:07:05 14:56:03-05:00 File Access Date/Time : 2020:07:05 14:56:03-05:00 File Inode Change Date/Time : 2020:07:05 14:56:03-05:00 File Permissions : rw-r-r- File Type : JPEG File Type Extension : jpg MIME Type : image/jpeg JFIF Version : 1.01 Resolution Unit : inches X Resolution : 72 Y Resolution : 72 Profile CMM Type : Little CMS Profile Version : 2.1.0 Profile Class : Display Device Profile Color Space Data : RGB Profile Connection Space : XYZ Profile Date Time : 2012:01:25 03:41:57 Profile File Signature : acsp Primary Platform : Apple Computer Inc. $ exiftool ocean.jpg ExifTool Version Number : 11.16 File Name : ocean.jpg Directory. Running the exiftool command reveals the following information. $ sudo apt install libimage-exiftool-perl -yĮxample 1: You are provided an image named ocean.jpg. Run the following command to install exiftool. You may need to install exiftool on your system. Flags may be hidden in the meta information and can easily be read by running exiftool. The images will be stored at this GIT repository if you’d like to download them and try the commands and tools for yourself.Įxiftool allows you to read and write meta information in files. There will be images associated with each command and tool. Please do not expect to find every flag using these methods. The challenges you encounter may not be as straight forward as the examples in this article.
Note: This is an introduction to a few useful commands and tools. In this article, we will focus on finding hidden data in images and introduce commands and tools that you can use to help you find the flag.
These skills must be applied to the challenges to solve for the correct answer. The participant or team with the highest score wins the event.Ĭhallenges incorporate several hacking skills such as web exploitation, reverse engineering, cryptography, and steganography. The more challenges you solve, the more flags you obtain, and the more points you receive. The flag is a hidden string that must be provided to earn points. Jeopardy-style capture the flag events are centered around challenges that participants must solve to retrieve the ‘flag’.
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