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Windows APT Warfare

You're reading from   Windows APT Warfare Identify and prevent Windows APT attacks effectively

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Product type Paperback
Published in Mar 2023
Publisher Packt
ISBN-13 9781804618110
Length 258 pages
Edition 1st Edition
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Author (1):
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Sheng-Hao Ma Sheng-Hao Ma
Author Profile Icon Sheng-Hao Ma
Sheng-Hao Ma
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Toc

Table of Contents (17) Chapters Close

Preface 1. Part 1 – Modern Windows Compiler
2. Chapter 1: From Source to Binaries – The Journey of a C Program FREE CHAPTER 3. Chapter 2: Process Memory – File Mapping, PE Parser, tinyLinker, and Hollowing 4. Chapter 3: Dynamic API Calling – Thread, Process, and Environment Information 5. Part 2 – Windows Process Internals
6. Chapter 4: Shellcode Technique – Exported Function Parsing 7. Chapter 5: Application Loader Design 8. Chapter 6: PE Module Relocation 9. Part 3 – Abuse System Design and Red Team Tips
10. Chapter 7: PE to Shellcode – Transforming PE Files into Shellcode 11. Chapter 8: Software Packer Design 12. Chapter 9: Digital Signature – Authenticode Verification 13. Chapter 10: Reversing User Account Control and Bypassing Tricks 14. Index 15. Other Books You May Enjoy Appendix – NTFS, Paths, and Symbols

tinyLoader example

The following example is the peLoader.cpp source code under the Chapter#6 folder of the GitHub project. In order to save space, this book only extracts the highlighted code; please refer to the complete source code see all the details of the project.

We first compile our msgbox.c source code as we did in Chapter 1 with MinGW and use the -Wl,--dynamicbase,--export-all-symbols arguments to generate an EXE file with a relocation table, msgbox_reloc.exe, as shown in Figure 6.3:

Figure 6.3 – The generation of msgbox_reloc.exe

Figure 6.3 – The generation of msgbox_reloc.exe

Figure 6.4 shows the fixReloc function responsible for correcting the relocation task for the entire PE module:

Figure 6.4 – The fixReloc function

Figure 6.4 – The fixReloc function

At lines 56-57 of the code, we can retrieve the starting point of the relocation table held in the current .reloc section from DataDirectory[IMAGE_BASE_RELOCATION] and later use it to analyze the relocation fields.

At lines...

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