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

Getting fuzzy

In the constant arms race of malware authoring and Digital Forensics and Incident Response (DFIR) analysts attempting to find solutions to common obfuscation techniques, hashbusting has also been addressed in the form of fuzzy hashing.

ssdeep is a fuzzy hashing algorithm that utilizes a similarity digest in order to create and output representations of files in the following format:


While it is not necessary to understand the technical aspects of ssdeep for most analysts, a few key points should be understood that differentiate ssdeep and fuzzy hashing from standard cryptographic hashing methods such as MD5 and SHA256: changing small portions of a file will not significantly change the ssdeep hash of the file, whereas changing one bit will entirely change the cryptographic hash.

With this in mind, let's take a ssdeep hash of our 8888888.png sample. Unfortunately, ssdeep is not installed by default in FLARE VM, so we will require...