What type of encryption has been used to Zyxel VMG8924-B10A config file?

[flightwatch]

I have managed to make a dump flash (another router of the same operator) with the manual:

https://limbenjamin.com/articles/dumping-aztech-DSL1015EN-firmware.html

Unfortunately, I don't know which tool I should use to change it into .bin.

If you could have a look, please check if the root's password is there.

If I am changing that file into .bin, do I have to delete the selected data?

https://i.postimg.cc/L6gFmd10/cut.png

Dump comes from 8 MB flash and it's here:

https://www119.zippyshare.com/v/pO87UAY7/file.html