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| #include <stdio.h>
#include <windows.h>
#include <tlhelp32.h>
#include <psapi.h>
#define TARGET_PROCESS_NAME "contest.exe"
#define WRITE_FILENAME "wjh.txt"
#define INJECT_ADDRESS_OFFSET 0xC761
#define FILENAME_ADDRESS_OFFSET 0x772FA
BYTE shellcode[] = { 0x49, 0x8B, 0xF8, 0x48, 0x8B, 0xF1, 0x6A, 0x10, 0x59, 0xFC, 0xF3, 0xA4 };
// Helper function to get the base address of a module in a process
DWORD_PTR GetModuleBaseAddress(HANDLE hProcess, const char* moduleName)
{
DWORD_PTR lpBaseAddress = 0;
HMODULE hMods[1024];
DWORD cbNeeded;
if (!EnumProcessModules(hProcess, hMods, sizeof(hMods), &cbNeeded)) {
return 0;
}
for (int i = 0; i < (cbNeeded / sizeof(HMODULE)); i++) {
char szModName[MAX_PATH];
if (GetModuleBaseNameA(hProcess, hMods[i], szModName, sizeof(szModName)) == 0) {
continue;
}
if (_stricmp(szModName, moduleName) != 0) {
continue;
}
MODULEINFO modInfo;
if (!GetModuleInformation(hProcess, hMods[i], &modInfo, sizeof(modInfo))) {
continue;
}
lpBaseAddress = (DWORD_PTR)modInfo.lpBaseOfDll;
break;
}
return lpBaseAddress;
}
// Helper function to suspend/resume all threads in a process
int SuspendResumeThreads(DWORD pid, BOOL suspend)
{
HANDLE hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, pid);
if (hSnapshot == INVALID_HANDLE_VALUE)
{
printf("Failed to create thread snapshot. Error code: %d\n", GetLastError());
return 1;
}
THREADENTRY32 te;
te.dwSize = sizeof(THREADENTRY32);
while (Thread32Next(hSnapshot, &te))
{
if (te.th32OwnerProcessID != pid)
continue;
HANDLE hThread = OpenThread(THREAD_SUSPEND_RESUME, FALSE, te.th32ThreadID);
if (hThread == NULL)
continue;
if (suspend)
SuspendThread(hThread);
else
ResumeThread(hThread);
CloseHandle(hThread);
}
CloseHandle(hSnapshot);
return 0;
}
// Helper function to modify memory in a process
int ModifyMemory(HANDLE hProcess, LPVOID lpAddress, LPVOID lpBuffer, SIZE_T nSize)
{
DWORD dwOldProtect;
if (!VirtualProtectEx(hProcess, lpAddress, nSize, PAGE_EXECUTE_READWRITE, &dwOldProtect)) {
printf("Failed to modify process memory protection. Error code: %d\n", GetLastError());
return 1;
}
SIZE_T bytesWritten;
if (!WriteProcessMemory(hProcess, lpAddress, lpBuffer, nSize, &bytesWritten)) {
printf("Failed to write to process memory. Error code: %d\n", GetLastError());
}
if (!VirtualProtectEx(hProcess, lpAddress, nSize, dwOldProtect, &dwOldProtect)) {
printf("Failed to restore process memory protection. Error code: %d\n", GetLastError());
return 1;
}
return 0;
}
// Helper function to find process by name
int FindProcessByName(const char* name, DWORD& pid)
{
DWORD processes[1024];
DWORD bytesReturned;
if (!EnumProcesses(processes, sizeof(processes), &bytesReturned))
{
printf("Failed to enumerate processes. Error code: %lu\n", GetLastError());
return 1;
}
DWORD count = bytesReturned / sizeof(DWORD);
for (DWORD i = 0; i < count; i++)
{
HANDLE hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, processes[i]);
if (hProcess)
{
char filename[MAX_PATH];
if (GetModuleFileNameExA(hProcess, NULL, filename, MAX_PATH) > 0)
{
if (strstr(filename, name) != NULL)
{
pid = processes[i];
CloseHandle(hProcess);
return 0;
}
}
}
CloseHandle(hProcess);
}
printf("Target process %s not found\n", name);
return 1;
}
int main()
{
DWORD pid = 0;
HANDLE hProcess = NULL;
char* pBaseAddress = NULL;
if (FindProcessByName(TARGET_PROCESS_NAME, pid))
{
return 1;
}
// Get handle to the target process
hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, pid);
if (hProcess == NULL)
{
printf("OpenProcess failed. Error code: %lu\n", GetLastError());
return 1;
}
// Get the address to modify in the target process
pBaseAddress = (char*)GetModuleBaseAddress(hProcess, TARGET_PROCESS_NAME);
// Suspend all threads of the target process
if (SuspendResumeThreads(pid, true))
{
printf("Failed to suspend process threads. Error code: %lu\n", GetLastError());
goto cleanup;
}
// Modify the memory of the target process
if (ModifyMemory(hProcess, pBaseAddress + INJECT_ADDRESS_OFFSET, shellcode, sizeof(shellcode)))
{
printf("Failed to modify memory. Error code: %lu\n", GetLastError());
goto cleanup;
}
// Modify the memory of the target process
if (ModifyMemory(hProcess, pBaseAddress + FILENAME_ADDRESS_OFFSET, (LPVOID)WRITE_FILENAME, sizeof(WRITE_FILENAME)))
{
printf("Failed to modify memory. Error code: %lu\n", GetLastError());
goto cleanup;
}
// Resume all threads of the target process
if (SuspendResumeThreads(pid, false))
{
printf("Failed to resume process threads. Error code: %lu\n", GetLastError());
goto cleanup;
}
printf("Memory modification successful\n");
cleanup:
CloseHandle(hProcess);
return 0;
}
|
wjh 收录于 Reverse
