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Windows APT Warfare

You're reading from  Windows APT Warfare

Product type Book
Published in Mar 2023
Publisher Packt
ISBN-13 9781804618110
Pages 258 pages
Edition 1st Edition
Languages
Author (1):
Sheng-Hao Ma Sheng-Hao Ma
Profile icon Sheng-Hao Ma

Table of Contents (17) Chapters

Preface 1. Part 1 – Modern Windows Compiler
2. Chapter 1: From Source to Binaries – The Journey of a C Program 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

Import API analyzer example

The following example is the iat_parser.cpp source code under the Chapter#5 folder of the GitHub project. In order to save space, this book only extracts the highlighted code. Please refer to the complete source code to read the full project.

Let’s try writing tools to analyze which system functions are imported into EXE programs. Figure 5.4 shows the entry function of iat_parser.cpp:

Figure 5.4 – The main function of iat_parser.cpp

Figure 5.4 – The main function of iat_parser.cpp

At lines 44-50 of the code, we first read the entire program into memory by fopen, and get the size of the global IAT and its RVA from the 13th item (i.e., IMAGE_DIRECTORY_ENTRY_IAT) in DataDirectory. Since each field in the global IAT is the correct system function address that is referenced in the .text section, and will point to the RVA of the system function name storage structure (IMAGE_IMPORT_BY_NAME) on the INT, each field is therefore an IMAGE_THUNK_DATA variable. We simply...

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