Create Check-DNS.ps1

This script will look for interesting artifacts in a DNS log export.  Feed it a CSV file with the format "FQDN,number" where number is the number of times the FDQN was hit.  This csv file could be created using a SIEM or a syslog server.  There are multiple outputs, each of which has their own value in hunting through DNS.  In the end, hopefully a couple of systems will stand out for investigation.