Domain names
Before jumping into the core of our infrastructure, one important point to bear in mind is the selection of our domain names. Indeed, we mean domain names in the plural sense, as you will require several domains to better mimic threat actors or one, at the very least, if you want to evaluate a specific point such as exfiltration, phishing, or beaconing.
Before digging into domain names, let's have a quick word about using direct IP. As soon as a suspicious action is caught during your exercise, the incident response team will start looking at logs, and network communications. Evidence pointing directly to an IP address will be considered highly suspicious and, therefore, analyzed deeply and quickly. Additionally, some security solutions have a number of blacklisting sharing features when they find something suspicious; therefore, we need to be careful that such features do not accidentally add one of the production IPs from our organization on such a list during...