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SteganographyChallengeFree

The Polyglot

One file. Two formats. One secret.

A staff ID badge image hides more than it shows. Learn to spot a polyglot file, carve the archive appended to an innocent-looking PNG, and decode what's inside.

Difficulty
Easy
Estimated time
20 min
Points
125 pts
Completions
Completed by 2 players
Authors
By Cyber Academy 4 U
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What you will learn

  • Recognise when a file is a polyglot (valid as one format, carrying another)
  • Use file-carving tools (binwalk, unzip) to extract an appended archive
  • Spot that metadata and first-look strings are decoys, not evidence
  • Decode a base64 payload to recover a hidden secret

What is inside

  1. Task 1 · The Polyglot1 question

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