Cookie Run OvenBreak MIDI new stream cipher investigation

[KookyRawn]

I tried to investigate the new CROB MIDI stream cipher by putting the bgm_map_land01.mid file in three different versions on Notepad.

RAW (decrypted)


SALSA20 (old encryption)


??? (new encryption)


I have an attachment containing new music starting from the Season 6 update, encrypted with an unknown stream cipher.

[KookyRawn]

Season 6 is over! Updated link: Cookie Run OvenBreak Season 6 Encrypted MIDIs.zip