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PicoCTF So Meta Writeup: Inspecting Image Metadata and Hidden Data

A compact So Meta walkthrough using image inspection and zsteg to recover the flag.

PicoCTFForensicsMetadatazsteg

So Meta is a picoCTF 2019 forensics challenge that points toward image metadata and hidden content.

Challenge image

Analysis

I used zsteg against the image to inspect embedded data:

zsteg pico_img.png

Flag

The flag appears in the tool output.

zsteg result

Key Takeaways

  1. Metadata-themed challenges are usually quick wins with basic inspection tools.
  2. If standard metadata is not enough, check for embedded data with steganography tools.
  3. Keep a small forensics checklist: file, strings, metadata tools, then stego tools.