true, it is upside down
I would assume it is interlocked cables one over one. Just not quite.
If I would try to make something like that I would knit 4 rows in st st, then make that crossing section (once cross strand 1 and 2, 3 and 4 and so on, then a few rows up cross 2 and 3, 4 and 5 and so on)
the cross is no simple cable, though. It looks like stitches were slipped with yarn in front. in 2 rows consecutively.
Honestly: I have not made this pattern. I am not quite so impressed, either. Maybe you have to see it at a large scale to admire.
Good luck in finding the pattern or someone to tell you exactly how it works.