Function at 0x403ff0
Capabilities:
Accept command line arguments
Check os version
Copy file
Delete file
Get common file path
Get file attributes
Get file system object information
Set current directory
Set environment variable
Shutdown system
Terminate process

Disassembly:
sub esp, 0x3f0
mov eax, dword [0x40d0fc]
xor eax, esp
mov dword [esp + 0x3ec], eax
push ebx
push ebp
push edi
call fcn.00409010
xor edi, edi
mov ebx, str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0xc], edi
mov ebp, edi
call dword [sym.imp.KERNEL32.dll_IsDebuggerPresent]
test eax, eax
je 0x40402a
push edi
call dword [sym.imp.KERNEL32.dll_ExitProcess]
push esi
push 0x8001
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
lea eax, [esp + 0x2c]
mov dword [esp + 0x40], edi
xorps xmm0, xmm0
mov dword [esp + 0x2c], 0x11c
push eax
movlpd qword [esp + 0x144], xmm0
call dword [sym.imp.KERNEL32.dll_GetVersionExW]
push 0x53
pop esi
test eax, eax
jne 0x404098
lea eax, [esp + 0x2c]
mov dword [esp + 0x2c], 0x114
push eax
call dword [sym.imp.KERNEL32.dll_GetVersionExW]
mov dl, 4
mov byte [esp + 0x146], dl
cmp word [esp + 0x40], si
jne 0x404094
mov eax, dword [esp + 0x5a]
add eax, 0xffffffd0
mov word [esp + 0x140], ax
jmp 0x40409f
xor eax, eax
jmp 0x40408a
mov dl, byte [esp + 0x146]
cmp dword [esp + 0x30], 0xa
jae 0x4040b1
movzx eax, word [esp + 0x38]
mov dword [esp + 0x38], eax
jmp 0x4040b5
mov eax, dword [esp + 0x38]
mov dword [0x47b658], eax
movzx eax, byte [esp + 0x30]
shl ax, 8
movzx ecx, ax
movzx eax, byte [esp + 0x34]
or ecx, eax
movzx eax, byte [esp + 0x140]
shl ax, 8
shl ecx, 0x10
movzx eax, ax
or ecx, eax
movzx eax, dl
or ecx, eax
mov eax, 0x600
mov dword [0x47b65c], ecx
sar ecx, 0x10
cmp cx, ax
je 0x404114
push edi
call fcn.0040782d
mov esi, eax
test esi, esi
je 0x404114
push 0xc00
mov ecx, esi
call dword [0x40a2dc]
call esi
mov esi, str.UXTHEME
push esi
call fcn.00406d58
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
inc esi
add esi, eax
cmp byte [esi], 0
jne 0x404119
push 0xc
call fcn.0040782d
push 0xa
call fcn.0040782d
push 8
mov dword [0x473550], eax
call fcn.0040782d
mov esi, eax
test esi, esi
je 0x404165
push 0x1e
mov ecx, esi
call dword [0x40a2dc]
call esi
test eax, eax
je 0x404165
or byte [0x47b65c], 0x80
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push edi
call dword [sym.imp.ole32.dll_OleInitialize]
push edi
push 0x2b4
mov dword [0x47b5c0], eax
lea eax, [esp + 0x150]
push eax
push edi
push 0x40b34c
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x473560
call fcn.00407a7a
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
push eax
mov esi, 0x4cc000
push esi
call fcn.00407a7a
movzx ecx, word [0x4cc000]
push 0x22
pop edi
push 0x20
pop edx
cmp cx, di
mov dword [0x473554], 0x400000
mov eax, edi
mov dword [esp + 0x14], edi
cmovne eax, edx
mov edx, 0x4cc002
movzx eax, ax
push eax
mov eax, esi
cmove eax, edx
push eax
call fcn.0040738d
push eax
call dword [sym.imp.USER32.dll_CharNextW]
mov ecx, eax
mov edi, ecx
mov dword [esp + 0x18], edi
movzx eax, word [ecx]
test ax, ax
je 0x4042e0
mov esi, eax
push 0x20
pop edx
movzx eax, si
cmp si, dx
jne 0x40421c
add ecx, 2
movzx eax, word [ecx]
cmp ax, dx
je 0x404211
mov edi, edx
movzx esi, ax
movzx edx, ax
cmp ax, word [esp + 0x14]
jne 0x404234
movzx edx, word [ecx + 2]
push 0x22
pop eax
mov edi, eax
cmp si, word [esp + 0x14]
lea eax, [ecx + 2]
cmovne eax, ecx
cmp dx, 0x2f
jne 0x40429e
push 0x53
add eax, 2
pop ecx
push 0x20
pop edx
cmp word [eax], cx
jne 0x40426b
movzx ecx, word [eax + 2]
cmp cx, dx
je 0x404261
test cx, cx
jne 0x40426b
mov dword [0x47b640], 1
cmp dword [eax], 0x43004e
jne 0x40428d
cmp dword [eax + 4], 0x430052
jne 0x40428d
movzx ecx, word [eax + 8]
cmp cx, dx
je 0x40428a
test cx, cx
jne 0x40428d
or ebp, 4
cmp dword [eax - 4], 0x2f0020
jne 0x40429e
cmp dword [eax], 0x3d0044
je 0x4042c8
push edi
push eax
call fcn.0040738d
mov ecx, eax
push 0x22
pop esi
movzx eax, word [ecx]
mov edx, eax
cmp ax, si
jne 0x4042ba
add ecx, 2
movzx edx, word [ecx]
movzx esi, dx
test dx, dx
jne 0x404206
jmp 0x4042dc
xor ecx, ecx
mov word [eax - 4], cx
add eax, 4
push eax
push 0x4d0000
call fcn.00407a7a
mov edi, dword [esp + 0x18]
mov esi, 0x4e0000
push esi
push 0x2000
call dword [sym.imp.KERNEL32.dll_GetTempPathW]
call fcn.0040462f
test eax, eax
jne 0x404356
push 0x1ffb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatW
call fcn.0040462f
test eax, eax
jne 0x404356
push esi
push 0x1ffc
call dword [sym.imp.KERNEL32.dll_GetTempPathW]
push 0x40b374
push esi
call sub.KERNEL32.dll_lstrcatW
push esi
push str.TEMP
call dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
push esi
push 0x40b388
call dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
call fcn.0040462f
test eax, eax
je 0x40453e
push 0x4dc000
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push ebp
call fcn.00403c0f
mov ebx, eax
test ebx, ebx
jne 0x40453e
cmp dword [0x47b564], eax
je 0x4043de
xor ebp, ebp
push ebp
push 0x4cc000
call fcn.0040738d
mov esi, eax
mov eax, 0x4cc000
jmp 0x4043a3
cmp dword [esi], 0x5f0020
jne 0x4043a0
cmp dword [esi + 4], 0x3d003f
je 0x4043a7
sub esi, 2
cmp esi, eax
jae 0x40438f
mov ebx, str.Error_launching_installer
cmp esi, eax
jb 0x4043f8
xor eax, eax
mov word [esi], ax
add esi, 8
push esi
call fcn.004073cf
test eax, eax
je 0x404542
push esi
push 0x4d0000
call fcn.00407a7a
push esi
push 0x4d4000
call fcn.00407a7a
mov ebx, ebp
or dword [0x47b64c], 0xffffffff
call fcn.0040657e
push 1
mov ebp, eax
call fcn.004074df
jmp 0x404542
call fcn.004070ec
push 0x4e0000
mov dword [esp + 0x1c], eax
call sub.KERNEL32.dll_lstrlenW
push edi
push section..ndata
mov esi, eax
call fcn.00407a7a
cmp word [0x4d0000], bp
jne 0x404430
push 0x4d8000
push 0x4d0000
call fcn.00407a7a
xor edi, edi
lea eax, [esi*2 + 0x4e0000]
inc edi
mov dword [esp + 0x14], eax
mov esi, ebp
movzx ebp, di
push ebp
push str.nsu_X.tmp
push eax
call dword [sym.imp.USER32.dll_wsprintfW]
mov eax, dword [0x47b570]
add esp, 0xc
push dword [eax + 0x120]
push 0x490000
call fcn.00406a2d
cmp dword [esp + 0x18], 0
push 0x4e0000
je 0x40447b
call fcn.004069d2
jmp 0x404480
call fcn.004069b2
test eax, eax
je 0x4044cd
push 0x490000
call dword [sym.imp.KERNEL32.dll_GetFileAttributesW]
test eax, 0x400
jne 0x404566
push 0x490000
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
test eax, eax
je 0x404566
push 1
push 0x4e0000
call fcn.004075de
mov eax, esi
inc esi
test eax, eax
jne 0x404566
mov eax, dword [esp + 0x14]
jmp 0x404443
push 0x4e0000
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
push 0
push 0x4e0000
call fcn.00406e0e
push 1
push 0x490000
push 0x4e8000
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x40453e
push 0
push 0x490000
call fcn.00406e0e
mov eax, dword [0x47b570]
push dword [eax + 0x124]
push 0x494000
call fcn.00406a2d
push 0x494000
call fcn.0040759b
test eax, eax
jne 0x404579
mov eax, esi
inc esi
test eax, eax
jne 0x40453e
push 0x490000
call fcn.00407366
test eax, eax
je 0x4044c4
mov ebp, dword [esp + 0x10]
xor edi, edi
call fcn.00403fa7
call dword [sym.imp.ole32.dll_OleUninitialize]
test ebx, ebx
je 0x404588
push 0x200010
push ebx
call fcn.00407a08
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
mov eax, dword [esp + 0x14]
inc edi
push 0
pop ebp
test di, di
jne 0x40443e
jmp 0x40453e
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
xor edi, edi
mov ebx, edi
mov ebp, ebx
jmp 0x404544
cmp dword [0x47b634], 0
je 0x40461b
lea eax, [esp + 0x18]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
test eax, eax
je 0x4045e1
lea eax, [esp + 0x20]
push eax
push str.SeShutdownPrivilege
push edi
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
push edi
push edi
push edi
lea eax, [esp + 0x28]
mov dword [esp + 0x28], 1
push eax
push edi
push dword [esp + 0x2c]
mov dword [esp + 0x40], 2
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.0040782d
mov esi, eax
mov ebx, 0x80040002
test esi, esi
je 0x404607
push ebx
push 0x25
push edi
push edi
push edi
mov ecx, esi
call dword [0x40a2dc]
call esi
test eax, eax
je 0x404614
push ebx
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x40461b
push 9
call fcn.0040156e
cmp dword [0x47b64c], 0xffffffff
cmovne ebp, dword [0x47b64c]
push ebp
jmp 0x404560