Function at 0x403cee
Capabilities:
Accept command line arguments
Check os version
Copy file
Delete file
Get common file path
Get file system object information
Set current directory
Set environment variable
Shutdown system
Terminate process

Disassembly:
sub esp, 0x3ec
and dword [esp], 0
push ebx
push ebp
push esi
push edi
push 0x20
pop eax
push 0x8001
mov edi, str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0x1c], eax
xor ebp, ebp
mov ebx, eax
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
and dword [esp + 0x40], ebp
lea eax, [esp + 0x2c]
mov esi, dword [sym.imp.KERNEL32.dll_GetVersionExW]
xorps xmm0, xmm0
push eax
movlpd qword [esp + 0x144], xmm0
mov dword [esp + 0x30], 0x11c
call esi
test eax, eax
jne 0x403d77
lea eax, [esp + 0x2c]
mov dword [esp + 0x2c], 0x114
push eax
call esi
push 0x53
pop eax
mov dl, 4
mov byte [esp + 0x146], dl
cmp word [esp + 0x40], ax
jne 0x403d73
mov eax, dword [esp + 0x5a]
add eax, 0xffffffd0
mov word [esp + 0x140], ax
jmp 0x403d7e
xor eax, eax
jmp 0x403d69
mov dl, byte [esp + 0x146]
cmp dword [esp + 0x30], 0xa
jae 0x403d90
movzx eax, word [esp + 0x38]
mov dword [esp + 0x38], eax
jmp 0x403d94
mov eax, dword [esp + 0x38]
movzx ecx, byte [esp + 0x30]
shl ecx, 8
mov dword [0x473658], eax
movzx eax, byte [esp + 0x34]
or ecx, eax
movzx eax, byte [esp + 0x140]
shl ecx, 8
or ecx, eax
movzx eax, dl
shl ecx, 8
or ecx, eax
mov eax, 0x600
mov dword [0x47365c], ecx
cmp word [0x47365e], ax
je 0x403de3
push 0
call fcn.0040720a
test eax, eax
je 0x403de3
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.004067e6
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
inc esi
add esi, eax
cmp byte [esi], 0
jne 0x403de8
push 0xb
call fcn.0040720a
push 9
call fcn.0040720a
push 7
mov dword [0x46b550], eax
call fcn.0040720a
test eax, eax
je 0x403e2a
push 0x1e
call eax
test eax, eax
je 0x403e2a
or byte [0x47365c], 0x80
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
xor esi, esi
push esi
call dword [sym.imp.ole32.dll_OleInitialize]
push esi
push 0x2b4
mov dword [0x4735c4], eax
lea eax, [esp + 0x150]
push eax
push esi
push 0x40a2e4
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x46b560
call fcn.00407448
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
push eax
mov esi, 0x4c4000
push esi
call fcn.00407448
push 0x22
mov eax, esi
mov dword [0x46b554], 0x400000
pop esi
cmp word [0x4c4000], si
jne 0x403e98
mov ebx, esi
mov eax, 0x4c4002
push ebx
push eax
call fcn.00406df8
push eax
call dword [sym.imp.USER32.dll_CharNextW]
push 2
mov dword [esp + 0x18], eax
pop ebx
jmp 0x403f37
push 0x20
pop edx
cmp cx, dx
jne 0x403ec1
add eax, ebx
cmp word [eax], dx
je 0x403eba
cmp word [eax], si
jne 0x403eca
add eax, ebx
mov edx, esi
cmp word [eax], 0x2f
jne 0x403f29
add eax, ebx
push 0x53
pop ecx
cmp word [eax], cx
jne 0x403ef4
movzx ecx, word [eax + 2]
cmp cx, word [esp + 0x18]
je 0x403eea
test cx, cx
jne 0x403ef4
mov dword [0x473640], 1
cmp dword [eax], 0x43004e
jne 0x403f18
cmp dword [eax + 4], 0x430052
jne 0x403f18
movzx ecx, word [eax + 8]
cmp cx, word [esp + 0x18]
je 0x403f15
test cx, cx
jne 0x403f18
or ebp, 4
cmp dword [eax - 4], 0x2f0020
jne 0x403f29
cmp dword [eax], 0x3d0044
je 0x403f45
push edx
push eax
call fcn.00406df8
cmp word [eax], si
jne 0x403f37
add eax, ebx
movzx ecx, word [eax]
test cx, cx
jne 0x403eb2
jmp 0x403f59
xor ecx, ecx
mov word [eax - 4], cx
add eax, 4
push eax
push 0x4c8000
call fcn.00407448
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
mov ebx, 0x4d8000
push ebx
push 0x2000
call esi
call fcn.00404246
test eax, eax
jne 0x403fcb
push 0x1ffb
push ebx
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push ebx
call sub.KERNEL32.dll_lstrcatW
call fcn.00404246
test eax, eax
jne 0x403fcb
push ebx
push 0x1ffc
call esi
push 0x40a30c
push ebx
call sub.KERNEL32.dll_lstrcatW
mov esi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
push ebx
push str.TEMP
call esi
push ebx
push 0x40a320
call esi
call fcn.00404246
test eax, eax
je 0x40417b
mov ebx, dword [sym.imp.KERNEL32.dll_DeleteFileW]
push 0x4d4000
call ebx
push ebp
call fcn.00403971
mov edi, eax
test edi, edi
jne 0x40417b
cmp dword [0x473560], eax
je 0x40404f
push eax
mov ebp, 0x4c4000
push ebp
call fcn.00406df8
mov esi, eax
jmp 0x404014
cmp dword [esi], 0x5f0020
jne 0x404011
cmp dword [esi + 4], 0x3d003f
je 0x404018
sub esi, 2
cmp esi, ebp
jae 0x404000
mov edi, str.Error_launching_installer
cmp esi, ebp
jb 0x404069
xor eax, eax
mov word [esi], ax
add esi, 8
push esi
call fcn.00406e30
test eax, eax
je 0x40417b
push esi
push 0x4c8000
call fcn.00407448
push esi
push 0x4cc000
call fcn.00407448
xor edi, edi
or dword [0x47364c], 0xffffffff
call fcn.00406054
push 1
mov ebx, eax
call fcn.00406ee0
jmp 0x40417f
call fcn.00406b5f
push str.nsu
mov ebp, 0x4d8000
mov esi, eax
push ebp
call sub.KERNEL32.dll_lstrcatW
test esi, esi
je 0x40408f
push 0x40a334
push ebp
call sub.KERNEL32.dll_lstrcatW
push 0x40a338
push ebp
call sub.KERNEL32.dll_lstrcatW
push 0x4d0000
push ebp
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
test eax, eax
je 0x40417b
push ebp
test esi, esi
je 0x4040ba
call fcn.0040647f
jmp 0x4040bf
call fcn.0040645f
push ebp
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
cmp word [0x4c8000], 0
jne 0x4040df
push 0x4d0000
push 0x4c8000
call fcn.00407448
push dword [esp + 0x14]
push section..ndata
call fcn.00407448
push 0x1a
mov dword [0x478000], 0x41
pop esi
mov eax, dword [0x47356c]
push dword [eax + 0x120]
push 0x4341f0
call fcn.004064fd
push 0x4341f0
call ebx
test edi, edi
je 0x404168
push 1
push 0x4341f0
push 0x4e0000
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x404168
push 0
push 0x4341f0
call fcn.00406887
mov eax, dword [0x47356c]
push dword [eax + 0x124]
push 0x4341f0
call fcn.004064fd
push 0x4341f0
call fcn.00406f9c
test eax, eax
je 0x404168
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
xor edi, edi
inc word [0x478000]
sub esi, 1
jne 0x4040fa
push esi
push ebp
call fcn.00406887
mov ebx, dword [esp + 0x10]
call fcn.00403cac
call dword [sym.imp.ole32.dll_OleUninitialize]
test edi, edi
je 0x4041a1
push 0x200010
push edi
call fcn.004073d6
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
cmp dword [0x473634], 0
je 0x404232
lea eax, [esp + 0x14]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
test eax, eax
je 0x4041ff
lea eax, [esp + 0x20]
push eax
push str.SeShutdownPrivilege
push 0
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
push 0
push 0
push 0
lea eax, [esp + 0x28]
mov dword [esp + 0x28], 1
push eax
push 0
push dword [esp + 0x28]
mov dword [esp + 0x40], 2
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.0040720a
mov esi, 0x80040002
test eax, eax
je 0x40421e
push esi
push 0x25
push 0
push 0
push 0
call eax
test eax, eax
je 0x40422b
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x404232
push 9
call fcn.00401549
cmp dword [0x47364c], 0xffffffff
cmovne ebx, dword [0x47364c]
push ebx
jmp 0x40419b