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Mastering Reverse Engineering

You're reading from   Mastering Reverse Engineering Re-engineer your ethical hacking skills

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Product type Paperback
Published in Oct 2018
Publisher Packt
ISBN-13 9781788838849
Length 436 pages
Edition 1st Edition
Tools
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Author (1):
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Reginald Wong Reginald Wong
Author Profile Icon Reginald Wong
Reginald Wong
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Table of Contents (15) Chapters Close

Preface 1. Preparing to Reverse 2. Identification and Extraction of Hidden Components FREE CHAPTER 3. The Low-Level Language 4. Static and Dynamic Reversing 5. Tools of the Trade 6. RE in Linux Platforms 7. RE for Windows Platforms 8. Sandboxing - Virtualization as a Component for RE 9. Binary Obfuscation Techniques 10. Packing and Encryption 11. Anti-analysis Tricks 12. Practical Reverse Engineering of a Windows Executable 13. Reversing Various File Types 14. Other Books You May Enjoy

How about an executable in its unpacked state?


Now that we have an executable file from Volatility, running this back in our Windows guest sandbox gives us the following message:

Remember that the packed executable has its own PE header and stub and not that of the original host's. The header, stub and compressed data were directly mapped to the process space. Every API function was dynamically imported. Even with the code and data decompressed, the entry point set in the header is still of the packed executables and not of the original hosts.  

 

 

Fortunately, x86dbg has a plugin known as Scylla. After reaching the original entry point, which means we are in the unpacked state, we can rebuild the process being debugged into a brand new executable file. The new executable file is already unpacked and can be executed alone.

This still requires us to debug the packed executable until we reach the original entry point (OEP). Once at the OEP, open up Scylla from the plugins' drop-down menu. This...

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