Not all the craters on the Moon are from impacts. This is almost certainly a cinder cone from a volcano located in Lacus Mortis - the Lake of Death, mwuhahaha. The pit is about 400 meters across (the whole image is 900 meters across) and is certainly billions of years old.

If this truly is a volcano, the last time it saw any action was when the Moon was much younger and more active. There are other features on the lunar surface that we're pretty sure are volcanoes, but it's still hard to tell from images like this. The only way to know for sure is to go there and see!

Original post: Ash hole on the Moon