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write-ups-challenges-2019-2020/weird_image_2/README.md
Robbe De Greef be3cd0d84b initial commit
2022-11-24 22:43:03 +01:00

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Weird Image 2

Description

Someone just sent me another odd image. I suspect there's something fishy about it as well.

Flag

IG{uNgHzyEGupQGPxL3}

Given files

weird_image_2.jpg

Solution

The flag can be found in the thumbnail of the image. The thumbnail can be extracted using exiftool. The thumbnail contains the flag encoded in binary. Read it from left to right, top to bottom, a bar without a hole in it is a 0, with a hole is a 1.