Author: Nathan Yam, Jonathan Kartawidjaja
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Typically images in CTF challenges utilize steganography to hide data. Upon noticing that this is a jpg, we should try analyzing this file through standard steganography tools such as but not limited to stegseek, steghide, zsteg, aperisolve, stegonline, exiftool, and strings .
This will not work, as there is no embedded data hidden within the image metadata. The flag is actually secretly embedded in the visual elements of the image.
The intended solution is to use a special cipher called pigpen to decode the characters in the circular portion of the jpg!
An online tool can be utilized for this:
