Malvertisers Are Back with a Vengeance

I’ve been tracking a crew of malvertisers that use Real Time Ad Bidding networks to push CryptoWall and other Ransomware exploits for the past few months. Two weeks ago, these bad guys went away….. somewhere. Who knows, maybe they went on a fabulous two week Cruise to the Caribbean or Mediterranean. But now these guys are back, and they have updated malware delivery infrastructure. The past 24 hours have been insane.