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Get another mega.nz link:
strings Hey_You.png | grep "mega"
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Get encoded flag:
binwalk -e Only_Few_Steps.jpg cd _Only_Few_Steps.jpg.extracted/ strings YouWon\(Almost\).jpg | grep -i "ctf"
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Decode (b64) 4 times:
echo "<encoded-flag>" | base64 -d | base64 -d | base64 -d | base64 -d