Next, we tried to locate the raw file through :
$ curl "https://ranoz.gg/download.php?file=download.php%3fsource" No luck. https- ranoz.gg file QfUhZZXf
$ 7z l secret_payload ... 0 0 0 0 0 -rw-r--r-- 0 0 secret.txt Extract: Next, we tried to locate the raw file
$ head -c 8 QfUhZZXf | hexdump -C 00000000 89 50 4e 47 0d 0a 1a 0a |.PNG....| The file is a that also contains additional data (likely steganography or an embedded archive). 5. Extracting Hidden Data from the PNG 5.1. Visual Inspection $ display QfUhZZXf # (or any image viewer) The image is a simple abstract pattern – nothing obvious. 5.2. Metadata & Chunk Analysis PNG files can embed arbitrary data in ancillary chunks (e.g., tEXt , zTXt , iTXt , eXIf ). Use pngcheck : Testing with some basic values:
<form method="GET" action="download.php"> <input type="text" name="file" placeholder="File name"> <input type="submit" value="Download"> </form> The parameter is file . Testing with some basic values: