That’s a really nice photo of Steatoda triangulosa, a Triangulate Cobweaver. Sometimes their markings look silver, more often, gold. This is a great example of the silver look. These aren’t dangerous spiders to people, but their venom is potent to insects and other spiders. They hide away in enclosed dark places because their predators have better vision than they do. They find prey through the vibrations on the traplines of their web. They monitor it by holding their feet against the strands.