Recently, Valve have released the new Prisma Case which contains many new CSGO skins including the UMP-45 Moonrise. Similar to the Glock-18 Moonrise, the UMP-45 has rare star patterns that adds more value to the skin. 

I was interested in finding one too and managed to snipe it from the Steam Community Market for a low price. Below is the one that is now in my inventory. 

It is not the best star pattern as the star is not centered but it was cheap so I just grabbed it. The pattern index is 945. 

During my search, I stumbled upon these. 

Except the one that I bought, the others were ridiculously pricey. These are not all the pattern indexes. They are only the ones that I managed to find in the market. 

Do comment if you know other pattern indexes with star pattern. It would certainly help players that are interested in finding them. Thank you