  Cyber threat intelligence is a relatively new field that has grown from two
distinct fields, cyber security and intelligence. As such, it draws knowledge
from and mixes the two fields. Yet, looking into current scientific research on
cyber threat intelligence research, it is relatively scarce, which opens up a
lot of opportunities. In this paper we define what cyber threat intelligence
is, briefly review some aspects for cyber threat intelligence. Then, we analyze
existing research fields that are much older that cyber threat intelligence but
related to it. This opens up an opportunity to draw knowledge and methods from
those older field, and in that way advance cyber threat intelligence much
faster than it would by following its own path. With such an approach we
effectively give a research directions for CTI.
