New York City system so that loss of one or two transmission lines or primary distribution feeders may compromise a significant part of the overall network .
In a telephone interview Friday, Soltani said that the relatively small number of users affected suggested either that attackers weren't on the network long or that they were only able to compromise a subset of the company's servers.
Immediately after reading the report grab the appendix of Key Indicators (KI) and Indicators of Compromise (IOC) and parse the last six weeks of network traffic you have captured.