Help Identifying Stain

Hey everyone,

I have a stain on the siding of my house. The material is painted stucco. It is under a roof overhang and doesn’t usually get wet. I’ve tried soap and water and that did not work. I understand it is raining in the photo but it looks the same when it is dry out. I live in Florida and am prepping my house to get sold and am trying to clean it up. Thank you for your time! It will only allow me to post one photo for some reason.

Looks kinda like an oil type stain? Did anything get on it? Painters washing out their tools or something?