Book Image

Malware Analysis Techniques

By : Dylan Barker
Book Image

Malware Analysis Techniques

By: Dylan Barker

Overview of this book

Malicious software poses a threat to every enterprise globally. Its growth is costing businesses millions of dollars due to currency theft as a result of ransomware and lost productivity. With this book, you'll learn how to quickly triage, identify, attribute, and remediate threats using proven analysis techniques. Malware Analysis Techniques begins with an overview of the nature of malware, the current threat landscape, and its impact on businesses. Once you've covered the basics of malware, you'll move on to discover more about the technical nature of malicious software, including static characteristics and dynamic attack methods within the MITRE ATT&CK framework. You'll also find out how to perform practical malware analysis by applying all that you've learned to attribute the malware to a specific threat and weaponize the adversary's indicators of compromise (IOCs) and methodology against them to prevent them from attacking. Finally, you'll get to grips with common tooling utilized by professional malware analysts and understand the basics of reverse engineering with the NSA's Ghidra platform. By the end of this malware analysis book, you’ll be able to perform in-depth static and dynamic analysis and automate key tasks for improved defense against attacks.
Table of Contents (17 chapters)
Section 1: Basic Techniques
Section 2: Debugging and Anti-Analysis – Going Deep
Section 3: Reporting and Weaponizing Your Findings
Section 4: Challenge Solutions

The basics – hashing

One of the most useful techniques an analyst has at their disposal is hashing. A hashing algorithm is a one-way function that generates a unique checksum for every file, much like a fingerprint of the file.

That is to say, every unique file passed through the algorithm will have a unique hash, even if only a single bit differs between two files. For instance, in the previous chapter, we utilized SHA256 hashing to verify whether a file that was downloaded from VirtualBox was legitimate.

Hashing algorithms

SHA256 is not the only hashing algorithm you're likely to come across as an analyst, though it is currently the most reliable in terms of balance of lack of collision and computational demand. The following table outlines hashing algorithms and their corresponding bits:

Analysis Tip

In terms of hashing, collision is an occurrence where two different files have identical hashes. When a collision occurs, a hashing...