Home PicoCTF 2018 Forensics 50: Forensics Warmup 2
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Forensics 50: Forensics Warmup 2

Challenge

Hmm for some reason I can’t open this PNG? Any ideas?

Solution

Turns out the file isn’t actually a png file (though gimp will open it even with
the wrong extension)

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$ file flag.png
flag.png: JPEG image data, JFIF standard 1.01, resolution (DPI), density 75x75, segment length 16, baseline, precision 8, 909x190, frames 3

Flag

picoCTF{extensions_are_a_lie}