You are presented with a file called Very_old_song.docx, which consists of two pages. At the end of this writeup you will find two screenshots taken from LibreOffice Writer.


This challenge was a bit mean, because you got a docx file, in which a sheet of music was compiled on various graphics. You could have searched with binwalk and similar tools for anomalies in the file for a long time, because the solution was to be found in the semantics of the notes.

If you can read notes, you will immediately notice a few peculiarities:

  • There are always eight whole notes to be seen, between which there is always random-looking garbage.
  • These sequences consist only of the notes C and D.
  • The note D is higher than the note C.
  • 8 is obviously an interesting number.

So if you take the value 0 for C and 1 for D, you get 28 bytes. If you convert these 28 bytes to ASCII you get the string Y3RmezV1Q2hfbjFDM19tVXMhY30=.

echo "Y3RmezV1Q2hfbjFDM19tVXMhY30=" | base64 -d


page1 page2 Solved by petrosyan