This can't be automated CW since it is some of the most sloppy-fisted Morse I've ever encountered. This sounds like a tired human sending on a straight key. This isn't the 4XZ that I'm used to and not on their known frequencies.
Since ~0030 UTC, has been sending: "VVV VVV VVV DE 4XZ" (but at times it seems to be "4KZ", "4MZ" or "4TZ".)
Prior to that, I heard what may have been 4 or 5 character groups but it was so sloppy that I'm not sure and the automated CW readers could not follow it.
I suppose that I should have put this in the Utility section but I'm really not sure about the authenticity right now.
Heard on an SDR in New England, USA.