circusmonkey404's Security Site

PicoCTF2018 Forensics Forensics Warmup 2 Objective: Hmm for some reason I can't open this PNG [1] ? Any ideas? Solution: Downloaded the file, its name is flag.png, try to open in in GUI and it gives an error lets run file against it and see what kind of file it might be @kali:~/Downloads$ file flag.png flag.png: JPEG image data, JFIF standard 1.01, resolution (DPI), density 75x75, segment length 16, baseline, precision 8, 909x190, components 3 ok lets change the extension to jpg @kali:~/Downloads$ cp flag.png flag.jpg now we can open it in the GUI picoCTF{extensions_are_a_lie}