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

Case study – Dharma

In recent years, ransomware has been very popular, and frequently offered as a service. Among these actors, there have been relatively low-skilled threat actors utilizing a ransomware suite named Dharma, as well as variants thereof:

Figure 3.12 – The Dharma ransom note

Figure 3.12 – The Dharma ransom note

In this case study, we'll walk through some of the techniques and tools utilized by the threat actor.

In the vast majority of Dharma cases, the initial vector has been to brute-force weak RDP credentials via a freely available tool called NLBrute. In scenarios such as this, hundreds of passwords and usernames would be tried until a successful RDP session was created.

After gaining access via the remote desktop protocol, hackers would often utilize Advanced IP Scanner to ascertain what other hosts on the network could be infected, and dump passwords from the system or attempt to use the cracked RDP password to authenticate elsewhere.

Once a...