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357 lines (341 loc) · 15.2 KB
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#if defined(_M_X64)
# error unsupport x86_64
#endif
#include "injectdll.h"
#include <Windows.h>
#include <stdint.h>
#include <tlhelp32.h>
#include <wow64ext.h>
static bool is_process64(HANDLE hProcess) {
BOOL wow64 = FALSE;
if (!IsWow64Process(hProcess, &wow64)) {
return false;
}
return !wow64;
}
static uint64_t wow64_module(const wchar_t* name) {
return GetModuleHandle64(name);
}
static uint64_t wow64_import(uint64_t module, const char* name) {
return GetProcAddress64(module, name);
}
template <class... Args>
static uint64_t wow64_call(uint64_t func, Args... args) {
return X64Call(func, sizeof...(args), (uint64_t)args...);
}
static uint64_t wow64_alloc_memory(uint64_t navm, HANDLE hProcess, SIZE_T dwSize, DWORD flProtect) {
uint64_t tmpAddr = 0;
uint64_t tmpSize = dwSize;
uint64_t ret = wow64_call(navm, hProcess, &tmpAddr, 0, &tmpSize, MEM_COMMIT, flProtect);
if (0 != ret) {
return 0;
}
return tmpAddr;
}
static bool wow64_write_memory(uint64_t nwvm, HANDLE hProcess, uint64_t lpBaseAddress, LPVOID lpBuffer, SIZE_T nSize) {
uint64_t written = 0;
uint64_t res = wow64_call(nwvm, hProcess, lpBaseAddress, lpBuffer, nSize, &written);
if (0 != res || nSize != written) {
return false;
}
return true;
}
static bool injectdll_x64(const PROCESS_INFORMATION& pi, const std::wstring& dll, const std::string_view& entry) {
static unsigned char sc[] = {
0x9C, // pushfq
0x0F, 0xA8, // push gs
0x0F, 0xA0, // push fs
0x50, // push rax
0x51, // push rcx
0x52, // push rdx
0x53, // push rbx
0x55, // push rbp
0x56, // push rsi
0x57, // push rdi
0x41, 0x50, // push r8
0x41, 0x51, // push r9
0x41, 0x52, // push r10
0x41, 0x53, // push r11
0x41, 0x54, // push r12
0x41, 0x55, // push r13
0x41, 0x56, // push r14
0x41, 0x57, // push r15
0x48, 0x83, 0xEC, 0x00, // sub rsp, 0 // rsp
0x49, 0xB9, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // mov r9, 0 // DllHandle
0x49, 0xB8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // mov r8, 0 // DllPath
0x48, 0x31, 0xD2, // xor rdx,rdx
0x48, 0x31, 0xC9, // xor rcx,rcx
0x48, 0xB8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // mov rax,0 // LdrLoadDll
0xFF, 0xD0, // call rax
0x49, 0xB9, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // mov r9, 0 // EntryFunc
0x4D, 0x31, 0xC0, // xor r8, r8
0x48, 0xBA, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // mov rdx,0 // EntryName
0x48, 0xB9, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // mov rcx,0 // DllHandle
0x48, 0x8B, 0x09, // mov rcx,[rcx]
0x48, 0xB8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // mov rax,0 // LdrGetProcedureAddress
0xFF, 0xD0, // call rax
0x48, 0xB8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // mov rax,0 // EntryFunc
0x48, 0x8B, 0x00, // mov rax,[rax]
0xFF, 0xD0, // call rax
0x48, 0x83, 0xC4, 0x00, // add rsp, 0 // rsp
0x41, 0x5F, // pop r15
0x41, 0x5E, // pop r14
0x41, 0x5D, // pop r13
0x41, 0x5C, // pop r12
0x41, 0x5B, // pop r11
0x41, 0x5A, // pop r10
0x41, 0x59, // pop r9
0x41, 0x58, // pop r8
0x5F, // pop rdi
0x5E, // pop rsi
0x5D, // pop rbp
0x5B, // pop rbx
0x5A, // pop rdx
0x59, // pop rcx
0x58, // pop rax
0x0F, 0xA1, // pop fs
0x0F, 0xA9, // pop gs
0x9D, // popfq
0xFF, 0x25, 0x00, 0x00, 0x00, 0x00, // jmp offset
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // rip
};
uint64_t ntdll = wow64_module(L"ntdll.dll");
if (!ntdll) {
return false;
}
uint64_t pfLdrLoadDll = wow64_import(ntdll, "LdrLoadDll");
uint64_t pfLdrGetProcedureAddress = wow64_import(ntdll, "LdrGetProcedureAddress");
if (!pfLdrLoadDll || !pfLdrGetProcedureAddress) {
return false;
}
uint64_t pfNtGetContextThread = wow64_import(ntdll, "NtGetContextThread");
uint64_t pfNtSetContextThread = wow64_import(ntdll, "NtSetContextThread");
uint64_t pfNtAllocateVirtualMemory = wow64_import(ntdll, "NtAllocateVirtualMemory");
uint64_t pfNtWriteVirtualMemory = wow64_import(ntdll, "NtWriteVirtualMemory");
if (!pfNtGetContextThread || !pfNtSetContextThread || !pfNtAllocateVirtualMemory || !pfNtWriteVirtualMemory) {
return false;
}
struct UNICODE_STRING {
USHORT Length;
USHORT MaximumLength;
uint64_t Buffer;
};
SIZE_T mem1size = sizeof(uint64_t) + sizeof(UNICODE_STRING) + (dll.size() + 1) * sizeof(wchar_t);
uint64_t mem1 = wow64_alloc_memory(pfNtAllocateVirtualMemory, pi.hProcess, mem1size, PAGE_READWRITE);
if (!mem1) {
return false;
}
SIZE_T mem2size = sizeof(uint64_t) + sizeof(UNICODE_STRING) + (entry.size() + 1) * sizeof(char);
uint64_t mem2 = wow64_alloc_memory(pfNtAllocateVirtualMemory, pi.hProcess, mem2size, PAGE_READWRITE);
if (!mem2) {
return false;
}
uint64_t shellcode = wow64_alloc_memory(pfNtAllocateVirtualMemory, pi.hProcess, sizeof(sc), PAGE_EXECUTE_READWRITE);
if (!shellcode) {
return false;
}
UNICODE_STRING us1;
us1.Length = (USHORT)(dll.size() * sizeof(wchar_t));
us1.MaximumLength = us1.Length + sizeof(wchar_t);
us1.Buffer = mem1 + sizeof(UNICODE_STRING);
if (!wow64_write_memory(pfNtWriteVirtualMemory, pi.hProcess, mem1, &us1, sizeof(UNICODE_STRING))) {
return false;
}
if (!wow64_write_memory(pfNtWriteVirtualMemory, pi.hProcess, us1.Buffer, (void*)dll.data(), us1.MaximumLength)) {
return false;
}
UNICODE_STRING us2;
us2.Length = (USHORT)(dll.size() * sizeof(wchar_t));
us2.MaximumLength = us2.Length + sizeof(wchar_t);
us2.Buffer = mem2 + sizeof(UNICODE_STRING);
if (!wow64_write_memory(pfNtWriteVirtualMemory, pi.hProcess, mem2, &us2, sizeof(UNICODE_STRING))) {
return false;
}
if (!wow64_write_memory(pfNtWriteVirtualMemory, pi.hProcess, us2.Buffer, (void*)entry.data(), us2.MaximumLength)) {
return false;
}
_CONTEXT64 ctx = { 0 };
ctx.ContextFlags = CONTEXT_CONTROL;
if (wow64_call(pfNtGetContextThread, pi.hThread, &ctx)) {
return false;
}
uint64_t dllhandle = us1.Buffer + us1.MaximumLength;
uint64_t entryfunc = us2.Buffer + us2.MaximumLength;
memcpy(sc + 34, &dllhandle, sizeof(dllhandle));
memcpy(sc + 44, &mem1, sizeof(mem1));
memcpy(sc + 60, &pfLdrLoadDll, sizeof(pfLdrLoadDll));
memcpy(sc + 72, &entryfunc, sizeof(entryfunc));
memcpy(sc + 85, &mem2, sizeof(mem2));
memcpy(sc + 95, &dllhandle, sizeof(dllhandle));
memcpy(sc + 108, &pfLdrGetProcedureAddress, sizeof(pfLdrGetProcedureAddress));
memcpy(sc + 120, &entryfunc, sizeof(entryfunc));
memcpy(sc + 171, &ctx.Rip, sizeof(ctx.Rip));
{
uint8_t v = 0x40 - (ctx.Rsp & 0x0F);
memcpy(sc + 31, &v, 1);
memcpy(sc + 136, &v, 1);
}
if (!wow64_write_memory(pfNtWriteVirtualMemory, pi.hProcess, shellcode, &sc, sizeof(sc))) {
return false;
}
ctx.ContextFlags = CONTEXT_CONTROL;
ctx.Rip = shellcode;
if (wow64_call(pfNtSetContextThread, pi.hThread, &ctx)) {
return false;
}
return true;
}
static bool injectdll_x86(const PROCESS_INFORMATION& pi, const std::wstring& dll, const std::string_view& entry) {
static unsigned char sc[] = {
0x68, 0x00, 0x00, 0x00, 0x00, // push eip
0x9C, // pushfd
0x60, // pushad
0x68, 0x00, 0x00, 0x00, 0x00, // push DllPath
0xB8, 0x00, 0x00, 0x00, 0x00, // mov eax, LoadLibraryW
0xFF, 0xD0, // call eax
0x68, 0x00, 0x00, 0x00, 0x00, // push EntryName
0x50, // push eax
0xB8, 0x00, 0x00, 0x00, 0x00, // mov eax, GetProcAddress
0xFF, 0xD0, // call eax
0xFF, 0xD0, // call eax
0x61, // popad
0x9D, // popfd
0xC3 // ret
};
DWORD pfLoadLibrary = (DWORD)::GetProcAddress(::GetModuleHandleW(L"Kernel32"), "LoadLibraryW");
if (!pfLoadLibrary) {
return false;
}
DWORD pfGetProcAddress = (DWORD)::GetProcAddress(::GetModuleHandleW(L"Kernel32"), "GetProcAddress");
if (!pfGetProcAddress) {
return false;
}
SIZE_T mem1size = (dll.size() + 1) * sizeof(wchar_t);
LPVOID mem1 = VirtualAllocEx(pi.hProcess, NULL, mem1size, MEM_COMMIT, PAGE_READWRITE);
if (!mem1) {
return false;
}
SIZE_T mem2size = (entry.size() + 1) * sizeof(char);
LPVOID mem2 = VirtualAllocEx(pi.hProcess, NULL, mem2size, MEM_COMMIT, PAGE_READWRITE);
if (!mem2) {
return false;
}
LPVOID shellcode = VirtualAllocEx(pi.hProcess, NULL, sizeof(sc), MEM_COMMIT, PAGE_EXECUTE_READWRITE);
if (!shellcode) {
return false;
}
SIZE_T written = 0;
BOOL ok = FALSE;
ok = WriteProcessMemory(pi.hProcess, mem1, dll.data(), mem1size, &written);
if (!ok || written != mem1size) {
return false;
}
ok = WriteProcessMemory(pi.hProcess, mem2, entry.data(), mem2size, &written);
if (!ok || written != mem2size) {
return false;
}
CONTEXT ctx = { 0 };
ctx.ContextFlags = CONTEXT_FULL;
if (!::GetThreadContext(pi.hThread, &ctx)) {
return false;
}
memcpy(sc + 1, &ctx.Eip, sizeof(ctx.Eip));
memcpy(sc + 8, &mem1, sizeof(mem1));
memcpy(sc + 13, &pfLoadLibrary, sizeof(pfLoadLibrary));
memcpy(sc + 20, &mem2, sizeof(mem2));
memcpy(sc + 26, &pfGetProcAddress, sizeof(pfGetProcAddress));
ok = WriteProcessMemory(pi.hProcess, shellcode, &sc, sizeof(sc), &written);
if (!ok || written != sizeof(sc)) {
return false;
}
ctx.ContextFlags = CONTEXT_CONTROL;
ctx.Eip = (DWORD)shellcode;
if (!::SetThreadContext(pi.hThread, &ctx)) {
return false;
}
return true;
}
bool injectdll(const PROCESS_INFORMATION& pi, const std::wstring& x86dll, const std::wstring& x64dll, const std::string_view& entry) {
if (is_process64(pi.hProcess)) {
return !x64dll.empty() && injectdll_x64(pi, x64dll, entry);
}
else {
return !x86dll.empty() && injectdll_x86(pi, x86dll, entry);
}
}
static bool setdebugprivilege() {
TOKEN_PRIVILEGES tp = { 0 };
HANDLE hToken = NULL;
if (!OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken)) {
return false;
}
tp.PrivilegeCount = 1;
tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
if (!LookupPrivilegeValueW(NULL, L"SeDebugPrivilege", &tp.Privileges[0].Luid)) {
CloseHandle(hToken);
return false;
}
if (!AdjustTokenPrivileges(hToken, FALSE, &tp, 0, NULL, NULL)) {
CloseHandle(hToken);
return false;
}
CloseHandle(hToken);
return true;
}
static DWORD getthreadid(DWORD pid) {
HANDLE h = CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, 0);
if (h != INVALID_HANDLE_VALUE) {
THREADENTRY32 te;
te.dwSize = sizeof(te);
for (BOOL ok = Thread32First(h, &te); ok; ok = Thread32Next(h, &te)) {
if (te.th32OwnerProcessID == pid) {
CloseHandle(h);
return te.th32ThreadID;
}
}
}
CloseHandle(h);
return 0;
}
static void closeprocess(PROCESS_INFORMATION& pi) {
if (pi.hProcess) CloseHandle(pi.hProcess);
if (pi.hThread) CloseHandle(pi.hThread);
pi = { 0 };
}
static bool openprocess(DWORD pid, DWORD process_access, DWORD thread_access, PROCESS_INFORMATION& pi) {
closeprocess(pi);
static bool ok = setdebugprivilege();
if (!ok) {
return false;
}
pi.dwProcessId = pid;
pi.hProcess = OpenProcess(process_access, FALSE, pi.dwProcessId);
if (!pi.hProcess) {
closeprocess(pi);
return false;
}
pi.dwThreadId = getthreadid(pi.dwProcessId);
if (!pi.dwThreadId) {
closeprocess(pi);
return false;
}
pi.hThread = OpenThread(thread_access, FALSE, pi.dwThreadId);
if (!pi.hThread) {
closeprocess(pi);
return false;
}
return true;
}
bool injectdll(DWORD pid, const std::wstring& x86dll, const std::wstring& x64dll, const std::string_view& entry) {
PROCESS_INFORMATION pi = { 0 };
if (!openprocess(pid, PROCESS_ALL_ACCESS, THREAD_GET_CONTEXT | THREAD_SET_CONTEXT | THREAD_SUSPEND_RESUME, pi)) {
return false;
}
if (-1 == SuspendThread(pi.hThread)) {
return false;
}
bool ok = injectdll(pi, x86dll, x64dll, entry);
ResumeThread(pi.hThread);
closeprocess(pi);
return ok;
}