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Practical Threat Intelligence and Data-Driven Threat Hunting

You're reading from   Practical Threat Intelligence and Data-Driven Threat Hunting A hands-on guide to threat hunting with the ATT&CK™ Framework and open source tools

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Product type Paperback
Published in Feb 2021
Publisher Packt
ISBN-13 9781838556372
Length 398 pages
Edition 1st Edition
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Author (1):
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Valentina Costa-Gazcón Valentina Costa-Gazcón
Author Profile Icon Valentina Costa-Gazcón
Valentina Costa-Gazcón
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Toc

Table of Contents (21) Chapters Close

Preface 1. Section 1: Cyber Threat Intelligence
2. Chapter 1: What Is Cyber Threat Intelligence? FREE CHAPTER 3. Chapter 2: What Is Threat Hunting? 4. Chapter 3: Where Does the Data Come From? 5. Section 2: Understanding the Adversary
6. Chapter 4: Mapping the Adversary 7. Chapter 5: Working with Data 8. Chapter 6: Emulating the Adversary 9. Section 3: Working with a Research Environment
10. Chapter 7: Creating a Research Environment 11. Chapter 8: How to Query the Data 12. Chapter 9: Hunting for the Adversary 13. Chapter 10: Importance of Documenting and Automating the Process 14. Section 4: Communicating to Succeed
15. Chapter 11: Assessing Data Quality 16. Chapter 12: Understanding the Output 17. Chapter 13: Defining Good Metrics to Track Success 18. Chapter 14: Engaging the Response Team and Communicating the Result to Executives 19. Other Books You May Enjoy Appendix – The State of the Hunt

The intelligence cycle

Before we dive into the theory of the intelligence cycle, I believe it is worth showing the relationship between data, knowledge, and intelligence practice through what is known as a knowledge pyramid. In it, we can see how the facts, through measurement, are transformed into data that we can extract information from when processing it. When analyzed together, it can be transformed into knowledge. This knowledge interacts with our own experience and forms the basis of what we call wisdom. It is this ultimate wisdom that we rely on for decision-making.

As shown in the following pyramid, we can intertwine this knowledge pyramid with the processes that are part of what is widely known as the intelligence cycle:

Figure 1.2 – DIKW pyramid

Figure 1.2 – DIKW pyramid

In short, here, we can deduce that an intelligence analyst must process data to transform it into wisdom (intelligence), which in the last instance will lead to an action (decision).

Traditionally, the intelligence process is understood as a six-phase cycle: planning and targeting, preparation and collection, processing and exploitation, analysis and production, dissemination and integration, and evaluation and feedback. Each of these phases presents its own particularities and challenges:

Figure 1.3 – The intelligence cycle

Figure 1.3 – The intelligence cycle

We will now look at each of these phases in detail.

Planning and targeting

The first step is to identify the IR (IRs). Any information that the decision makers need and don't know enough about falls under this category.

In this stage of the process, it is important to identify the key assets of the organization, why the organization might be an interesting target, and what the security concerns of those in charge of making decisions are.

It's also important to identify the potential threats that exist and what mitigations can be prioritized (through a process known as threat modeling), as well as establishing a collection framework and collection priorities.

Preparation and collection

This stage refers to defining and developing collection methods to obtain information regarding the requirements that were established in the previous phase.

It is important to keep in mind that it's impossible to answer all the questions we may have and meet all our IR.

Processing and exploitation

Once the planned data has been collected, the next step is to process it to generate information. The processing method is usually not perfect, and the amount of data that the intelligence team is able to process is always lower than the amount of data that has been gathered. All data that does not get processed is the same as data not collected at all. It's lost intelligence.

Analysis and production

The information that's been gathered so far must be analyzed in order to generate intelligence. There are several techniques that are used for intelligence analysis and to prevent the analyst's bias. The cyber threat intelligence analyst must learn how to filter their personal views and opinions to carry out the analysis.

Dissemination and integration

In this stage, the intelligence that's been produced is distributed to the necessary sectors. Before distribution, the analysts have to consider a variety of things, such as what the most pressing issues are among the intelligence that's been collected, who should receive the report, how urgent the intelligence is or how much detail the recipient needs, if the report should include preventive recommendations, and so on. Sometimes, different reports may need to be created and directed to different audiences.

Evaluation and feedback

This is the final stage of the process and probably the most difficult to achieve, mainly due to the usual lack of feedback from intelligence recipients. Establishing good mechanisms to get feedback helps intelligence producers evaluate the effectiveness of the intelligence that's been generated before they repeat the process over and over, without making the necessary adjustments that will make the intelligence that's produced more relevant to the recipients. As intelligence producers, we want our intelligence to be relevant – we want our intelligence to help the decision makers to make informed decisions. Without gathering the appropriate feedback, we won't know if we are achieving our goal, and we won't know which steps to take to improve our product.

This model has been widely accepted and adopted, especially in the United States of America and among those who follow their academic discussions in an attempt to replicate its methods. Despite this wide acceptance, there have been some vocal criticisms against this model.

Some have pointed out that the current model depends excessively on the data that's been collected, and also that technological advances have allowed us to collect massive amounts of it. This endless harvesting process and the capacity to better represent the data that's been collected leads us to believe that this process is enough for us to understand what is happening.

There have been alternative proposals for the intelligence cycle. For anyone interested in studying more on this matter, there is a particularly interesting contribution that's been published by Davies, Gustafson and Ridgen (2013) titled The Intelligence Cycle is Dead, Long Live the Intelligence Cycle: Rethinking Intelligence Fundamentals for a New Intelligence Doctrine (https://bura.brunel.ac.uk/bitstream/2438/11901/3/Fulltext.pdf), in which what has been labeled the UK Intelligence Cycle is described in detail:

Figure 1.4 – The Core Functions of Intelligence (JDP 2-00) (3rd Edition)

Figure 1.4 – The Core Functions of Intelligence (JDP 2-00) (Third Edition)

Now, let's learn how to define and identify our IR.

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Practical Threat Intelligence and Data-Driven Threat Hunting
Published in: Feb 2021
Publisher: Packt
ISBN-13: 9781838556372
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