Function at 0x4033c4
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, 0x2d4
push ebx
push esi
push edi
push 0x20
pop edi
sub ebx, ebx
push 0x8001
mov dword [esp + 0x14], ebx
mov dword [esp + 0x10], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0x1c], ebx
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
call dword [sym.imp.KERNEL32.dll_GetVersion]
and eax, 0xbfffffff
cmp ax, 6
mov dword [0x42a20c], eax
je 0x403414
push ebx
call fcn.004066d3
cmp eax, ebx
je 0x403414
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.00406663
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], 0
jne 0x403419
push 0xa
call fcn.004066d3
push 8
call fcn.004066d3
push 6
mov dword [0x42a204], eax
call fcn.004066d3
cmp eax, ebx
je 0x40345c
push 0x1e
call eax
or eax, eax
je 0x40345c
or byte [0x42a20f], 0x40
push ebp
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x42a2d8], eax
push ebx
lea eax, [esp + 0x34]
push 0x2b4
push eax
push ebx
push 0x4216a8
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x429200
call fcn.004062f9
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
mov ebp, 0x435000
push eax
push ebp
call fcn.004062f9
cmp word [0x435000], 0x22
mov dword [0x42a200], 0x400000
push ebp
pop eax
jne 0x4034c5
push 0x22
mov eax, 0x435002
pop edi
push edi
push eax
call fcn.00405bfb
push eax
call dword [sym.imp.USER32.dll_CharNextW]
mov ecx, eax
mov dword [esp + 0x18], ecx
mov ax, word [ecx]
cmp ax, bx
je 0x4035f6
push 0x20
pop ebx
cmp ax, bx
jne 0x4034f4
inc ecx
inc ecx
cmp word [ecx], bx
je 0x4034ed
cmp word [ecx], 0x22
jne 0x4034ff
inc ecx
push 0x22
inc ecx
pop ebx
cmp word [ecx], 0x2f
jne 0x4035c2
inc ecx
inc ecx
cmp word [ecx], 0x53
jne 0x40352a
mov ax, word [ecx + 2]
cmp ax, 0x20
je 0x403520
test ax, ax
jne 0x40352a
mov dword [0x42a2c0], 1
movzx eax, word [0x40a2c2]
cdq
shld edx, eax, 0x10
shl eax, 0x10
push eax
pop edi
sub esi, esi
movzx eax, word [0x40a2c0]
cdq
movzx edx, word [str.NCRC]
or edi, eax
movzx eax, word [0x40a2be]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx]
or edi, edx
cmp eax, esi
jne 0x403580
mov eax, dword [ecx + 4]
cmp eax, edi
jne 0x403580
mov ax, word [ecx + 8]
cmp ax, 0x20
je 0x40357b
test ax, ax
jne 0x403580
or dword [esp + 0x1c], 4
movzx eax, word [0x40a2b6]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
sub esi, esi
movzx eax, word [0x40a2b4]
cdq
movzx edx, word [str.__D]
or edi, eax
movzx eax, word [0x40a2b2]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx - 4]
or edi, edx
cmp eax, esi
jne 0x4035c2
mov eax, dword [ecx]
cmp eax, edi
je 0x4035e1
push ebx
push ecx
call fcn.00405bfb
push eax
pop ecx
cmp word [ecx], 0x22
jne 0x4035d3
inc ecx
inc ecx
mov ax, word [ecx]
test ax, ax
jne 0x4034e5
jmp 0x4035f4
and word [ecx - 4], 0
add ecx, 4
push ecx
push 0x435800
call fcn.004062f9
sub ebx, ebx
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
mov edi, 0x437800
push edi
push 0x400
call esi
call fcn.00403393
test eax, eax
jne 0x403668
push 0x3fb
push edi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push edi
call sub.KERNEL32.dll_lstrcatW
call fcn.00403393
or eax, eax
jne 0x403668
push edi
push 0x3fc
call esi
push 0x40a29c
push edi
call sub.KERNEL32.dll_lstrcatW
mov esi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
push edi
push str.TEMP
call esi
push edi
push 0x40a288
call esi
call fcn.00403393
test eax, eax
je 0x403733
push 0x437000
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push dword [esp + 0x1c]
call fcn.00402f4a
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x403733
cmp dword [0x42a220], ebx
je 0x403723
push ebx
push ebp
call fcn.00405bfb
mov esi, eax
cmp esi, ebp
jb 0x4036ed
movzx eax, word [0x40a282]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov ebx, eax
movzx eax, word [0x40a280]
movzx ecx, word [0x40a27c]
cdq
or ebx, eax
movzx eax, word [0x40a27e]
shl eax, 0x10
or eax, ecx
sub ecx, ecx
cdq
or ecx, eax
push ebx
pop eax
or eax, edx
mov edx, dword [esi]
cmp edx, ecx
jne 0x4036e5
mov edx, dword [esi + 4]
cmp edx, eax
je 0x4036eb
dec esi
dec esi
cmp esi, ebp
jae 0x4036d8
sub ebx, ebx
cmp esi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x40375f
mov word [esi], bx
add esi, 8
push esi
call fcn.00405cd6
test eax, eax
je 0x403733
push esi
push 0x435800
call fcn.004062f9
push esi
push 0x436000
call fcn.004062f9
mov dword [esp + 0x10], ebx
or dword [0x42a2cc], 0xffffffff
call fcn.004039df
mov dword [esp + 0x14], eax
call fcn.00403905
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x403869
push 0x200010
push dword [esp + 0x10]
call fcn.0040595f
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.004058ca
push 0x40a270
push edi
mov esi, eax
call sub.KERNEL32.dll_lstrcatW
cmp esi, ebx
je 0x403780
push 0x40a26c
push edi
call sub.KERNEL32.dll_lstrcatW
push str..tmp
push edi
call sub.KERNEL32.dll_lstrcatW
mov ebp, 0x436800
push ebp
push edi
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
test eax, eax
je 0x403733
cmp esi, ebx
push edi
je 0x4037a8
call fcn.00405830
jmp 0x4037ad
call fcn.004058ad
push edi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
cmp word [0x435800], bx
jne 0x4037c8
push ebp
push 0x435800
call fcn.004062f9
push dword [esp + 0x18]
push section..ndata
call fcn.004062f9
movzx eax, word [0x40a25a]
movzx ecx, word [0x40a258]
shl eax, 0x10
or eax, ecx
push 0x1a
mov dword [0x42b800], eax
pop ebp
mov esi, 0x420ea8
mov eax, dword [0x42a214]
push dword [eax + 0x120]
push esi
call fcn.0040631b
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
cmp dword [esp + 0x10], ebx
je 0x403853
push 1
push esi
push 0x438800
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x403853
push ebx
push esi
call fcn.004060bf
mov eax, dword [0x42a214]
push dword [eax + 0x124]
push esi
call fcn.0040631b
push esi
call fcn.004058e2
cmp eax, ebx
je 0x403853
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc word [0x42b800]
dec ebp
jne 0x4037f6
push ebx
push edi
call fcn.004060bf
jmp 0x403733
cmp dword [0x42a2b4], ebx
je 0x4038ed
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 0x4038bd
lea eax, [esp + 0x20]
push eax
push str.SeShutdownPrivilege
push ebx
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
push ebx
push ebx
lea eax, [esp + 0x24]
push ebx
push eax
push ebx
push dword [esp + 0x28]
mov dword [esp + 0x34], 1
mov dword [esp + 0x40], 2
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.004066d3
cmp eax, ebx
mov esi, 0x80040002
je 0x4038d9
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x4038e6
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
or eax, eax
jne 0x4038ed
push 9
call fcn.0040140b
mov eax, dword [0x42a2cc]
cmp eax, 0xffffffff
je 0x4038fb
mov dword [esp + 0x10], eax
push dword [esp + 0x10]
call dword [sym.imp.KERNEL32.dll_ExitProcess]