Shutdown Windows programmatically

[Vortex]

Here is the code to shutdown Windows. The necessary privilege for this operation is required on NT based systems.

Code Select Expand


; Built with Pelles Macro Assembler, Version 6.50.0

; Code running on Windows NT based systems


include     ShutdownWindows.inc


.data

SE_SHUTDOWN_NAME_ db 'SeShutdownPrivilege',0


.code

start:

   invoke  GetShutdownPrivileges

   invoke  ExitWindowsEx,EWX_FORCE or EWX_SHUTDOWN,0

   invoke  ExitProcess,0


GetShutdownPrivileges PROC USES esi

LOCAL TokenPriv:TOKEN_PRIVILEGES
LOCAL hToken:DWORD

   invoke  GetCurrentProcess

   lea     ecx,hToken

   invoke  OpenProcessToken,eax,\
                            TOKEN_ADJUST_PRIVILEGES or TOKEN_QUERY,\
                            ecx                          

   lea     esi,TokenPriv

   invoke  LookupPrivilegeValue,0,ADDR SE_SHUTDOWN_NAME_,\
                                ADDR TOKEN_PRIVILEGES.Privileges.Luid[esi]

   mov     TOKEN_PRIVILEGES.PrivilegeCount[esi],1
   mov     TOKEN_PRIVILEGES.Privileges.Attributes[esi],SE_PRIVILEGE_ENABLED

   invoke  AdjustTokenPrivileges,hToken,0,ADDR TokenPriv,0,0,0

   ret

GetShutdownPrivileges ENDP


END start


[TimoVJL]

Almost same in C

Code Select Expand

#define WIN32_DEFAULT_LIBS
#define WIN32_LEAN_AND_MEAN
#include <windows.h>

BOOL GetShutdownPrivileges(void);

//TCHAR szAppName[] = TEXT("ShutDownWindows");

int __cdecl WinMainCRTStartup(void)
{
if (GetShutdownPrivileges()) {
//MessageBox(0, TEXT("Got it"), szAppName, MB_OK);
//MessageBox(0, TEXT("Got it"), SE_SHUTDOWN_NAME, MB_OK);
ExitWindowsEx(EWX_FORCE | EWX_SHUTDOWN, 0);
}
ExitProcess(0);
}

BOOL GetShutdownPrivileges(void)
{
TOKEN_PRIVILEGES tp;
HANDLE hToken;
BOOL bRet = FALSE;
if (OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
{
if (LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME, &tp.Privileges[0].Luid))
{
tp.PrivilegeCount = 1;
tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
if (AdjustTokenPrivileges(hToken, FALSE, &tp, 0, NULL, NULL))
{
DWORD dwErr = GetLastError();
if (dwErr == ERROR_SUCCESS)
bRet = TRUE;
}
}
CloseHandle(hToken);
}
return bRet;
}


[Vortex]

Hi timovjl,

Thanks for the C version.

[Vortex]

Similar example with the API function InitiateSystemShutdown

In the console, you need to type shutdown -a to abort the command.