__declspec(dllexport) int Add(int a, int b) return a + b;
Author: AI Research Division Date: April 14, 2026 Abstract Dynamic Link Libraries (DLLs) are fundamental to the Windows operating system, promoting code reuse and modularity. However, from a security research and malware analysis perspective, DLLs are black boxes containing executable logic. This paper explores the technical process of disassembling DLLs—converting machine code back into human-readable assembly language. We examine the structural differences between DLLs and standard executables (EXEs), the tooling required (IDA Pro, Ghidra, x64dbg), and the specific challenges posed by position-independent code, relocations, and export tables. 1. Introduction A DLL is a library of functions and resources that can be called by multiple applications simultaneously. Unlike a standard EXE, a DLL cannot be executed directly (it lacks an entry point like WinMain ). To analyze a DLL’s behavior—whether for vulnerability research, malware analysis, or legacy software maintenance—an analyst must disassemble it. disassembly dll
Understanding these differences is critical because disassembly tools must parse the header differently. 3. Methodology for DLL Disassembly 3.1 Static Disassembly (Offline Analysis) Static analysis examines the DLL file without executing it. __declspec(dllexport) int Add(int a, int b) return a
__declspec(dllexport) int Add(int a, int b) return a + b;
Author: AI Research Division Date: April 14, 2026 Abstract Dynamic Link Libraries (DLLs) are fundamental to the Windows operating system, promoting code reuse and modularity. However, from a security research and malware analysis perspective, DLLs are black boxes containing executable logic. This paper explores the technical process of disassembling DLLs—converting machine code back into human-readable assembly language. We examine the structural differences between DLLs and standard executables (EXEs), the tooling required (IDA Pro, Ghidra, x64dbg), and the specific challenges posed by position-independent code, relocations, and export tables. 1. Introduction A DLL is a library of functions and resources that can be called by multiple applications simultaneously. Unlike a standard EXE, a DLL cannot be executed directly (it lacks an entry point like WinMain ). To analyze a DLL’s behavior—whether for vulnerability research, malware analysis, or legacy software maintenance—an analyst must disassemble it.
Understanding these differences is critical because disassembly tools must parse the header differently. 3. Methodology for DLL Disassembly 3.1 Static Disassembly (Offline Analysis) Static analysis examines the DLL file without executing it.