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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

Getting signed by abusing path normalization

This technique is based on the author’s presentation Digital Signature? Nah, You Don’t Care About That Actually ;) at the iThome Information Security Conference CYBERSEC 2020 in Taiwan. It is mainly based on Matt’s research and extension of the security flaws of Windows path normalization to achieve digital signature forgery.

As we mentioned earlier, the system functions for verifying the digital signature, WinVerifyTrust, will internally call the three export functions in Crypt32.dllCryptSIPDllIsMyFileType, CryptSIPGetSignedDataMsg, and CryptSIPVerifyIndirectData – and verify that a file on the path has a valid digital signature.

In the previous section, we attacked CryptSIPGetSignedDataMsg by forging a digital signature on any program, and we attacked CryptSIPVerifyIndirectData by hiding a backdoor in a signed program file from a fingerprint hash calculation process. In this section, we will...

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