I do not know the "real" name of this mode, but it is Russian and it is sometimes called "CIS 4FSK 150Bd", "CIS MFSK-4", or "CIS FTM-4".
Note the resting freq of 5125 kHz, and then the 4 FSK channels with 4 kHz shift between them, for a total tone width of 12 kHz.
This mode has been around for years, but is not common.
I have a brief video of it on my YouTube channel. But I really need to do a more detailed video...one day.
https://www.youtube.com/watch?v=Wq-mAr0qS3sT!