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

  1. While the information necessary could easily have been gleaned by behavioral analysis, you could have gained an understanding of the script by de-obfuscating the code through VBSEdit. Once done, it should become clear the site in question is domenuscdm[.]com.
  2. Utilizing the same methodology, you should have been able to find the malware utilizing MsXmlHttp to download the secondary stages and make HTTP requests to the site.
  3. This one is a bit trickier. However, with the right recipe, you will get a good start. The correct recipe is as follows:

    – From Base64

    – Remove Null Bytes

    However, as you've noticed, things seem to be out of order and splatted, as discussed in the chapter by utilizing numbers in curly braces. When put into the order specified, the following domains become clear: