Book Image

Learning Malware Analysis

By : Monnappa K A
5 (1)
Book Image

Learning Malware Analysis

5 (1)
By: Monnappa K A

Overview of this book

Malware analysis and memory forensics are powerful analysis and investigation techniques used in reverse engineering, digital forensics, and incident response. With adversaries becoming sophisticated and carrying out advanced malware attacks on critical infrastructures, data centers, and private and public organizations, detecting, responding to, and investigating such intrusions is critical to information security professionals. Malware analysis and memory forensics have become must-have skills to fight advanced malware, targeted attacks, and security breaches. This book teaches you the concepts, techniques, and tools to understand the behavior and characteristics of malware through malware analysis. It also teaches you techniques to investigate and hunt malware using memory forensics. This book introduces you to the basics of malware analysis, and then gradually progresses into the more advanced concepts of code analysis and memory forensics. It uses real-world malware samples, infected memory images, and visual diagrams to help you gain a better understanding of the subject and to equip you with the skills required to analyze, investigate, and respond to malware-related incidents.
Table of Contents (19 chapters)
Title Page
Copyright and Credits
Dedication
Packt Upsell
Contributors
Preface
Index

4. Arithmetic Operations


You can perform addition, subtraction, multiplication, and division in assembly language. A addition and subtraction are performed using the add and sub instructions, respectively. These instructions take two operands: destination and source. The add instruction adds the source and destination and stores the result in the destination. The sub instruction subtracts the source from the destination operand, and the result is stored in the destination. These instructions set or clear flags in the eflags register, based on the operation. These flags can be used in the conditional statements. The sub instruction sets the zero flag, (zf), if the result is zero, and the carry flag, (cf), if the destination value is less than the source. The following outlines a few variations of these instructions:

add eax,42      ; same as eax = eax+42
add eax,ebx     ; same as eax = eax+ebx
add [ebx],42    ; adds 42 to the value in address specified by ebx
sub eax, 64h    ; subtracts hex...