The Intelligence Framework Update
Recently Bro's intelligence framework was refactored and extended with a couple of new features. This post will discuss the updates and tries to clear some of the backgrounds that turned out to be common pitfalls in the past.
The Intelligence Framework Data Model
Understanding the intel framework's data model is the key for exploiting its full potential, so let's have a closer look: The core of an intelligence datum is the indicator (also indicator of compromise, IoC), e.g. an IP, hash or domain name (for a list of available types see Bro's script reference). The indicator can be enriched by meta data of different kinds, e.g. a description, url or severity level. The same indicator can be obtained from different intelligence sources, providing different meta data. Thus in Bro's intelligence framework, a plain indicator can be described by multiple meta data records. A meta data