Seeing abnormal Suricata alerts isn’t too unusual in my home environment. In many cases it may be a TLD being resolved that at one point in time was very suspicious. With the increased legitimate adoption of some of these domains, these alerts have been less useful, although still interesting to investigate. I ran into a few of these alerts one night and when diving deeper there was an unusual amount, frequency, and source of the alerts.
Article Link: https://isc.sans.edu/diary/rss/29246