Programming Linux Anti-Reversing Techniques
Programming Linux Anti-Reversing Techniques
About the Book
Unlike many reverse engineering books, Programming Linux Anti-Reversing Techniques provides working code so that the reader can better understand how anti reverse engineering techniques are generated and analyzed. The code starts off as a very straight forward C bind shell that gets modified throughout the book. Each chapter shows the reader how a reverse engineer might look at a binary and how to frustrate that analysis.
About the Author
Table of Contents
-
Preface
- Why Read This Book?
- Topics Not Covered
- Prerequisites
- Code and Command Output
-
Chapter 1: Introductions
- Introducing “Trouble”
- Using CMake
- The Code
- Compiling
- Executing
- Accessing the Shell
-
Chapter 2: Compiler Options
-
-g
- Recovering the Bind Shell Password with Hexdump
- Recovering the Bind Shell Password with GDB
- The Debugging Information in IDA
- Removing the Debugging Information
- Case Study: XOR DDOS
-
-s
- SYMTAB vs. DYNSYM
- Finding the Bind Shell Password Using .symtab
- Case Study: The FILE Symbol
- Examing Trouble After -s
-
-fvisibility
- Looking at FUNC symbols
- Hiding FUNC symbols
-
-O
- Corrected Block Tiny Encryption Algorithm (XXTEA)
- -Os
- -O3
- -funroll-loops
-
-static
- Resolving Functions at Runtime
- ltrace
- LD_PRELOAD
- Using musl
-
-g
-
Chapter 3: File Format Hacks
- The Strip Utility
- Removing the Section Headers Table
- Little Endian or Big Endian?
-
The Sections Are a Lie
- Flipping the Executable Bit
- Lying with .init
- Hiding the Entry Point
- Mixing the Symbols
-
Chapter 4: Fighting Off String Analysis
- Code Reorganization
- Stack Strings
- XOR Stack String
-
Function Encryption
- Computing the Function’s Size Using a Linker Script
- Decryption Logic
- Encryption Logic
-
Creating a Cryptor
- Implementing the Cryptor
- Analyzing the Cryptor
-
Chapter 5: Obstructing Code Flow Analysis
- Indirect Function Calls
- Signals
- Early Return
- Jump Over an Invalid Byte
- Jump! Jump!
- Always Follow the Conditional
- Overlapping Instructions
-
Chapter 6: Evading the Debugger
- Trace Me
- Trapping the Debugger
- Becoming Attached
- madvise
- prctl
- Detection Before main()
- Computing Function Checksums
- Conclusion: All That We Fall For
- Notes
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