Jacob Baines - Programming Linux Anti-Reversing Techniques [2016, PDF, ENG]

Примеры страниц

Оглавление

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
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