An Italian Penguin — metactf

Description

Original organizer description was not preserved locally.

Available hint: Hint 1: Search up Linux (To make a duplicate + Spaghetti is a type of what?)

English summary: the task provides a JPEG image named Penguin_Steg.jpg. The goal is to identify the correct stego path, derive the passphrase from the hint, extract the hidden payload, and recover the flag.

Analysis

The image was first treated as a standard JPEG stego target. Basic recon and extraction attempts did not immediately help:

• EXIF, strings, and appended-data checks were clean.
• stegdetect reported outguess(old)(***), but this turned out to be a false positive.
• Clean reference images from the same penguin image family produced the same misleading outguess hit.
• Multiple OutGuess candidate keys only produced garbage and wasted time.

The useful pivot came from identifying the picture itself. Penguin_Steg.jpg matches the well-known ccpenguin image associated with the history of Tux and Linux mascot lore. That made the hint much more meaningful:

• duplicate → copy
• spaghetti is a type of → pasta
• Linux + copy + pasta → Linux copypasta

The most recognizable Linux copypasta is the GNU/Linux meme, so the correct passphrase is:

GNU/Linux

Once that interpretation was tried, extraction succeeded immediately.

Solution

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