Paper wasps will generally only attack if they themselves or their nest are threatened Wikipedia
While I was trying to capture this Araneus nox spider, out of a sudden the Sumatra Paper Wasp came and grabbed the spider.
Seems Wasp really stung it and paralyzed it, I was not sure if the wasp placed the corpse in the wasp nest, as I did not see the nest.
Spotted at Dairy Farm Nature Park