There was a video. That showed pages from a document. Purportedly listing all the DUMBs worldwide and their status (blackhat controlled, taken back by white hats, demolished, etc.)
I have no idea if the info in that video was factual. But it was very interesting. It's pretty long. We skimmed through it. They voice-over explaining status as they show parts of the document.
https://www.youtube.com/watch?v=TWBOxH9UcwI&feature=youtu.be