Function at 0x40385c
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, 0x3ec
push ebx
push ebp
push esi
push edi
xor ebx, ebx
mov edi, str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
push 0x8001
mov dword [esp + 0x14], ebx
mov ebp, ebx
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
mov esi, dword [sym.imp.KERNEL32.dll_GetVersionExW]
lea eax, [esp + 0x2c]
xorps xmm0, xmm0
mov dword [esp + 0x40], ebx
push eax
movlpd qword [esp + 0x144], xmm0
mov dword [esp + 0x30], 0x11c
call esi
test eax, eax
jne 0x4038de
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 0x4038da
mov eax, dword [esp + 0x5a]
add eax, 0xffffffd0
mov word [esp + 0x140], ax
jmp 0x4038e5
xor eax, eax
jmp 0x4038d0
mov dl, byte [esp + 0x146]
cmp dword [esp + 0x30], 0xa
jae 0x4038f7
movzx eax, word [esp + 0x38]
mov dword [esp + 0x38], eax
jmp 0x4038fb
mov eax, dword [esp + 0x38]
mov dword [0x429638], 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 [0x42963c], ecx
sar ecx, 0x10
cmp cx, ax
je 0x403950
push ebx
call fcn.00406a91
test eax, eax
je 0x403950
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.00406349
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
inc esi
add esi, eax
cmp byte [esi], bl
jne 0x403955
push 0xc
call fcn.00406a91
push 0xa
call fcn.00406a91
push 8
mov dword [0x428530], eax
call fcn.00406a91
test eax, eax
je 0x403996
push 0x1e
call eax
test eax, eax
je 0x403996
or byte [0x42963c], 0x80
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
push ebx
push 0x2b4
mov dword [0x4295a0], eax
lea eax, [esp + 0x150]
push eax
push ebx
push 0x4085cc
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x428540
call fcn.00406cc5
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
push eax
mov esi, 0x434000
push esi
call fcn.00406cc5
movzx ecx, word [0x434000]
push 0x22
pop ebx
push 0x20
pop edx
cmp cx, bx
mov dword [0x428534], 0x400000
mov eax, ebx
mov dword [esp + 0x14], ebx
cmovne eax, edx
mov edx, 0x434002
movzx eax, ax
push eax
mov eax, esi
cmove eax, edx
push eax
call fcn.004067a1
push eax
call dword [sym.imp.USER32.dll_CharNextW]
mov ecx, eax
mov ebx, ecx
mov dword [esp + 0x18], ebx
movzx eax, word [ecx]
test ax, ax
je 0x403b11
mov esi, eax
push 0x20
pop edx
movzx eax, si
cmp si, dx
jne 0x403a4d
add ecx, 2
movzx eax, word [ecx]
cmp ax, dx
je 0x403a42
mov ebx, edx
movzx esi, ax
movzx edx, ax
cmp ax, word [esp + 0x14]
jne 0x403a65
movzx edx, word [ecx + 2]
push 0x22
pop eax
mov ebx, eax
cmp si, word [esp + 0x14]
lea eax, [ecx + 2]
cmovne eax, ecx
cmp dx, 0x2f
jne 0x403acf
push 0x53
add eax, 2
pop ecx
push 0x20
pop edx
cmp word [eax], cx
jne 0x403a9c
movzx ecx, word [eax + 2]
cmp cx, dx
je 0x403a92
test cx, cx
jne 0x403a9c
mov dword [0x429620], 1
cmp dword [eax], 0x43004e
jne 0x403abe
cmp dword [eax + 4], 0x430052
jne 0x403abe
movzx ecx, word [eax + 8]
cmp cx, dx
je 0x403abb
test cx, cx
jne 0x403abe
or ebp, 4
cmp dword [eax - 4], 0x2f0020
jne 0x403acf
cmp dword [eax], 0x3d0044
je 0x403af9
push ebx
push eax
call fcn.004067a1
mov ecx, eax
push 0x22
pop ebx
movzx eax, word [ecx]
mov edx, eax
cmp ax, bx
jne 0x403aeb
add ecx, 2
movzx edx, word [ecx]
movzx esi, dx
test dx, dx
jne 0x403a37
jmp 0x403b0d
xor ecx, ecx
mov word [eax - 4], cx
add eax, 4
push eax
push 0x434800
call fcn.00406cc5
mov ebx, dword [esp + 0x18]
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
push 0x436800
push 0x400
call esi
call fcn.00403e5f
test eax, eax
jne 0x403b97
push 0x3fb
push 0x436800
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push 0x436800
call sub.KERNEL32.dll_lstrcatW
call fcn.00403e5f
test eax, eax
jne 0x403b97
push 0x436800
push 0x3fc
call esi
push 0x4085f4
mov esi, 0x436800
push esi
call sub.KERNEL32.dll_lstrcatW
push esi
mov esi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
push str.TEMP
call esi
push 0x436800
push 0x408608
call esi
call fcn.00403e5f
test eax, eax
je 0x403d78
push 0x436000
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push ebp
call fcn.004034e7
mov edi, eax
test edi, edi
jne 0x403d78
cmp dword [0x429544], eax
je 0x403c1f
xor ebp, ebp
push ebp
push 0x434000
call fcn.004067a1
mov esi, eax
mov eax, 0x434000
jmp 0x403be4
cmp dword [esi], 0x5f0020
jne 0x403be1
cmp dword [esi + 4], 0x3d003f
je 0x403be8
sub esi, 2
cmp esi, eax
jae 0x403bd0
mov edi, str.Error_launching_installer
cmp esi, eax
jb 0x403c32
xor eax, eax
mov word [esi], ax
add esi, 8
push esi
call fcn.004067e3
test eax, eax
je 0x403dc2
push esi
push 0x434800
call fcn.00406cc5
push esi
push 0x435000
call fcn.00406cc5
mov edi, ebp
or dword [0x42962c], 0xffffffff
call fcn.00405bf8
mov ebx, eax
jmp 0x403d7c
call fcn.004066a7
push 0x436800
mov dword [esp + 0x1c], eax
call sub.KERNEL32.dll_lstrlenW
push ebx
push section..ndata
mov esi, eax
call fcn.00406cc5
cmp word [0x434800], bp
jne 0x403c6a
push 0x435800
push 0x434800
call fcn.00406cc5
xor ebx, ebx
lea eax, [esi*2 + 0x436800]
inc ebx
mov dword [esp + 0x14], eax
mov esi, ebp
movzx ebp, bx
push ebp
push str.nsu_X.tmp
push eax
call dword [sym.imp.USER32.dll_wsprintfW]
mov eax, dword [0x429550]
add esp, 0xc
push dword [eax + 0x120]
push 0x42c800
call fcn.00406053
cmp dword [esp + 0x18], 0
push 0x436800
je 0x403cb5
call fcn.00405ff8
jmp 0x403cba
call fcn.00405fd8
test eax, eax
je 0x403d07
push 0x42c800
call dword [sym.imp.KERNEL32.dll_GetFileAttributesW]
test eax, 0x400
jne 0x403da0
push 0x42c800
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
test eax, eax
je 0x403da0
push 1
push 0x436800
call fcn.004068c4
mov eax, esi
inc esi
test eax, eax
jne 0x403da0
mov eax, dword [esp + 0x14]
jmp 0x403c7d
push 0x436800
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
push 0
push 0x436800
call fcn.004063e8
push 1
push 0x42c800
push 0x437800
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x403d78
push 0
push 0x42c800
call fcn.004063e8
mov eax, dword [0x429550]
push dword [eax + 0x124]
push 0x42d000
call fcn.00406053
push 0x42d000
call fcn.00406881
test eax, eax
jne 0x403db3
mov eax, esi
inc esi
test eax, eax
jne 0x403d78
push 0x42c800
call fcn.0040677a
test eax, eax
je 0x403cfe
mov ebx, dword [esp + 0x10]
xor ebp, ebp
call fcn.0040381a
call dword [sym.imp.ole32.dll_OleUninitialize]
test edi, edi
je 0x403dc6
push 0x200010
push edi
call fcn.00406c53
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
mov eax, dword [esp + 0x14]
inc ebx
push 0
pop ebp
test bx, bx
jne 0x403c78
jmp 0x403d78
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
xor ebp, ebp
mov edi, ebp
mov ebx, edi
jmp 0x403d7e
mov ebx, ebp
jmp 0x403d7c
cmp dword [0x429614], 0
je 0x403e4b
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 0x403e1b
lea eax, [esp + 0x20]
push eax
push str.SeShutdownPrivilege
push ebp
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
push ebp
push ebp
push ebp
lea eax, [esp + 0x28]
mov dword [esp + 0x28], 1
push eax
push ebp
push dword [esp + 0x2c]
mov dword [esp + 0x40], 2
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.00406a91
mov esi, 0x80040002
test eax, eax
je 0x403e37
push esi
push 0x25
push ebp
push ebp
push ebp
call eax
test eax, eax
je 0x403e44
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403e4b
push 9
call fcn.00401533
cmp dword [0x42962c], 0xffffffff
cmovne ebx, dword [0x42962c]
push ebx
jmp 0x403d9a