Created
February 27, 2024 20:22
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Retrieves the base address of kernel32.dll using x64 assembly in C++
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#include <iostream> | |
#include <windows.h> | |
void* GetBaseAddressOfKernel32() { | |
void* kernel32BaseAddress = nullptr; | |
__asm { | |
mov rdi, 0xFFFFFFFFFFFFFFFF // Set RDI to -1 | |
inc rdi // Increment RDI to 0 | |
mov rax, 0 // Zero out RAX | |
lea rsi, [rax + 10h] // Calculate intermediate address | |
add rsi, 50h // Adjust address for PEB | |
mov rbx, gs:[rsi] // Load PEB address into RBX | |
lea rsi, [rbx + 10h + 8h] // Calculate address for LDR | |
mov rbx, [rsi] // Load LDR address into RBX | |
lea rsi, [rbx + 10h + 10h] // Calculate InLoadOrderModuleList address | |
mov rbx, [rsi] // Load InLoadOrderModuleList into RBX | |
mov rbx, [rbx] // Move to the first entry (ntdll.dll) | |
mov rbx, [rbx] // Move to the second entry (kernel32.dll) | |
lea rsi, [rbx + 10h + 10h] // Calculate base address of kernel32.dll | |
mov rbx, [rsi] // Load base address of kernel32.dll into RBX | |
mov rax, rbx // Move base address to RAX | |
mov kernel32BaseAddress, rax // Store base address in variable | |
} | |
return kernel32BaseAddress; | |
} | |
int main() { | |
void* kernel32BaseAddr = GetBaseAddressOfKernel32(); | |
std::cout << "Base Address of kernel32.dll: " << kernel32BaseAddr << std::endl; | |
return 0; | |
} |
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