Stink bugs
Unfortunately we have them in the wooded areas of southwest Michigan.
I find a few of them every year in the room with attic access.
My nephew found 2 of them about 20 minutes apart and declared LOUDLY that "you have an infestation of those bugs." He was in a panic!!! LOL!
Just a few every year. I do squish them and the stink only last about a minute.
If you come into my house WHERE YOU DON'T BELONG, you are not going out alive!