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Khatrimaza-org-mkv: The

mkvextract tracks khatrimaza-org.mkv 0:video.h264 1:audio.aac 2:subtitles.srt mkvextract attachments khatrimaza-org.mkv 0:Roboto-Regular.ttf 1:hidden.bin Now we have the following files in our working directory:

$ mediainfo khatrimaza-org.mkv General Complete name : khatrimaza-org.mkv Format : Matroska File size : 84.3 MiB Duration : 00:03:45.000 Overall bit rate : 2 028 kb/s The Khatrimaza-org-mkv

Comment: s3cr3t_k3y_4_f1ag That looks like a plausible key. Let’s try XOR‑decrypting hidden.bin with that key. We write a tiny Python script that repeats the key over the file and XORs each byte. mkvextract tracks khatrimaza-org

2 00:00:03,001 --> 00:00:07,000 Enjoy the movie. Nothing hidden in the subtitles – just a generic welcome message. We quickly glance at them with ffprobe just to be sure there’s nothing weird: The Khatrimaza-org-mkv

key = b's3cr3t_k3y_4_f1ag' data = open('hidden.bin', 'rb').read()

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mkvextract tracks khatrimaza-org.mkv 0:video.h264 1:audio.aac 2:subtitles.srt mkvextract attachments khatrimaza-org.mkv 0:Roboto-Regular.ttf 1:hidden.bin Now we have the following files in our working directory:

$ mediainfo khatrimaza-org.mkv General Complete name : khatrimaza-org.mkv Format : Matroska File size : 84.3 MiB Duration : 00:03:45.000 Overall bit rate : 2 028 kb/s

Comment: s3cr3t_k3y_4_f1ag That looks like a plausible key. Let’s try XOR‑decrypting hidden.bin with that key. We write a tiny Python script that repeats the key over the file and XORs each byte.

2 00:00:03,001 --> 00:00:07,000 Enjoy the movie. Nothing hidden in the subtitles – just a generic welcome message. We quickly glance at them with ffprobe just to be sure there’s nothing weird:

key = b's3cr3t_k3y_4_f1ag' data = open('hidden.bin', 'rb').read()