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

Chapter 8: De-Obfuscating Malicious Scripts: Putting the Toothpaste Back in the Tube

Often during malware analysis, a malicious binary is not the initial stage that presents to the end user. Somewhat frequently, an initial "dropper" in the format of a script—be it PowerShell, Visual Basic Scripting (VBS), a malicious Visual Basic for Applications (VBA) macro, JavaScript, or anything else—is responsible for the initial infection and implantation of the binary.

This has been the case in modern times with malware families Emotet, Qakbot, TrickBot, and many others. Historically, VBA scripts have comprised the entirety of a malware family—for instance, ILOVEYOU, an infamous virus from the early 2000s written in Microsoft's own VBS language.

In this chapter, we'll examine the following points that will assist us with de-obfuscating malicious scripts, somewhat akin to attempting to push toothpaste back into a tube after it's already been...