This is a fast and simple old small brick wall texture that can have dust and dirt added.
I used a slightly different method for coming up with the pattern for the cracks using the flood fill on different areas. I liked the result it gave with just changing the angle variation and BBox size. The cracks simple node is one of the utilities I created for myself.
It's quite a simple graph to follow if you want to experiment with this style for yourself.
As always if you have any questions just ask!
Thanks for viewing!