Shutdown Windows programmatically

[Vortex]

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

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; 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