Exercise to Detect Algorithmically Generated Domain Names
nbviewer.ipython.org
nbviewer.ipython.org
As a result of the encoding, the domain names look junky while perhaps they aren't.
One little issue is that's assuming techniques like this aren't used to generate the domains, which is not only an obvious 'next step', but thanks to the 'weird' domains and the find-web-online-lol.info type results which look incredibly spammy, is probably already happening and has probably been happening for years (wouldn't surprise me with the amount of spam wielding Markov chain generators out there). That's definitely what I'd do if I was in the position of the VXer, if I was determined to use DNS at all.
Wonder if any of those are 'fast-flux'?