The Cyber Underground General Intelligence Requirements Handbook (CU-GIRH) is a baseline tool to assist in organizing, prioritizing, producing and measuring production of cyber underground intelligence. Central to the handbook are General Intelligence requirements (GIRs) Central to this handbook is a compilation of frequently asked questions applicable to the cyber underground (i.e., illicit forums, instant messaging channels, marketplaces, products, services and adversaries) Each GIR includes a definition and the essential elements of information (EEIs) needed to answer the basic questions who, what, when, where, why and how.
Source: https://www.helpnetsecurity.com/2021/02/16/cyber-underground-general-intelligence-requirements-handbook/