Function at 0x4033b6
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 ebp
push esi
push 0x20
xor ebp, ebp
pop esi
mov dword [esp + 0xc], ebp
push 0x8001
mov dword [esp + 0xc], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0x18], ebp
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
call dword [sym.imp.KERNEL32.dll_GetVersion]
cmp ax, 6
je 0x4033fb
push ebp
call fcn.00406559
cmp eax, ebp
je 0x4033fb
push 0xc00
call eax
push ebx
push edi
push str.UXTHEME
call fcn.004064ed
push str.USERENV
call fcn.004064ed
push str.SETUPAPI
call fcn.004064ed
push 9
call fcn.00406559
push 7
call fcn.00406559
mov dword [0x42a264], eax
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebp
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x42a318], eax
push ebp
lea eax, [esp + 0x34]
push 0x2b4
push eax
push ebp
push 0x421708
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x429260
call fcn.00406183
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
mov ebx, 0x435000
push eax
push ebx
call fcn.00406183
push ebp
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
cmp word [0x435000], 0x22
mov dword [0x42a260], eax
mov eax, ebx
jne 0x403498
push 0x22
mov eax, 0x435002
pop esi
push esi
push eax
call fcn.00405b64
push eax
call dword [sym.imp.USER32.dll_CharNextW]
mov ecx, eax
mov dword [esp + 0x18], ecx
mov ax, word [ecx]
cmp ax, bp
je 0x4035ca
push 0x20
pop edx
cmp ax, dx
jne 0x4034c7
inc ecx
inc ecx
cmp word [ecx], dx
je 0x4034c0
cmp word [ecx], 0x22
mov ebp, edx
jne 0x4034d4
inc ecx
push 0x22
inc ecx
pop ebp
cmp word [ecx], 0x2f
jne 0x403596
inc ecx
inc ecx
cmp word [ecx], 0x53
jne 0x4034fe
mov ax, word [ecx + 2]
cmp ax, dx
je 0x4034f4
test ax, ax
jne 0x4034fe
mov dword [0x42a300], 1
movzx eax, word [0x40a37e]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x40a37c]
cdq
movzx edx, word [str.NCRC]
or edi, eax
movzx eax, word [0x40a37a]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx]
or edi, edx
cmp eax, esi
jne 0x403554
mov eax, dword [ecx + 4]
cmp eax, edi
jne 0x403554
mov ax, word [ecx + 8]
cmp ax, 0x20
je 0x40354f
test ax, ax
jne 0x403554
or dword [esp + 0x1c], 4
movzx eax, word [0x40a372]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x40a370]
cdq
movzx edx, word [str.__D]
or edi, eax
movzx eax, word [0x40a36e]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx - 4]
or edi, edx
cmp eax, esi
jne 0x403596
mov eax, dword [ecx]
cmp eax, edi
je 0x4035b5
push ebp
push ecx
call fcn.00405b64
mov ecx, eax
cmp word [ecx], 0x22
jne 0x4035a7
inc ecx
inc ecx
mov ax, word [ecx]
test ax, ax
jne 0x4034b8
jmp 0x4035c8
and word [ecx - 4], 0
add ecx, 4
push ecx
push 0x435800
call fcn.00406183
xor ebp, ebp
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
mov esi, 0x437800
push esi
push 0x400
call edi
call fcn.00403385
test eax, eax
jne 0x40363c
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatW
call fcn.00403385
test eax, eax
jne 0x40363c
push esi
push 0x3fc
call edi
push 0x40a358
push esi
call sub.KERNEL32.dll_lstrcatW
mov edi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
push esi
push str.TEMP
call edi
push esi
push 0x40a344
call edi
call fcn.00403385
test eax, eax
je 0x403707
push 0x437000
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push dword [esp + 0x1c]
call fcn.00402e41
cmp eax, ebp
mov dword [esp + 0x10], eax
jne 0x403707
cmp dword [0x42a27c], ebp
je 0x4036f7
push ebp
push ebx
call fcn.00405b64
mov edi, eax
cmp edi, ebx
jb 0x4036c1
movzx eax, word [0x40a33e]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov ebp, eax
movzx eax, word [0x40a33c]
movzx ecx, word [0x40a338]
cdq
or ebp, eax
movzx eax, word [0x40a33a]
shl eax, 0x10
or eax, ecx
xor ecx, ecx
cdq
or ecx, eax
mov eax, ebp
or eax, edx
mov edx, dword [edi]
cmp edx, ecx
jne 0x4036b9
mov edx, dword [edi + 4]
cmp edx, eax
je 0x4036bf
dec edi
dec edi
cmp edi, ebx
jae 0x4036ac
xor ebp, ebp
cmp edi, ebx
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x403734
mov word [edi], bp
add edi, 8
push edi
call fcn.00405c3f
test eax, eax
je 0x403707
push edi
push 0x435800
call fcn.00406183
push edi
push 0x436000
call fcn.00406183
mov dword [esp + 0x10], ebp
or dword [0x42a30c], 0xffffffff
call fcn.004039cc
mov dword [esp + 0x14], eax
call fcn.004038da
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebp
pop edi
pop ebx
je 0x40383e
push 0x200010
push dword [esp + 0xc]
call fcn.004058c8
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.0040584b
push 0x40a32c
push esi
mov edi, eax
call sub.KERNEL32.dll_lstrcatW
cmp edi, ebp
je 0x403755
push 0x40a328
push esi
call sub.KERNEL32.dll_lstrcatW
push str..tmp
push esi
call sub.KERNEL32.dll_lstrcatW
mov ebx, 0x436800
push ebx
push esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
test eax, eax
je 0x403707
cmp edi, ebp
push esi
je 0x40377d
call fcn.004057b1
jmp 0x403782
call fcn.0040582e
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
cmp word [0x435800], bp
jne 0x40379d
push ebx
push 0x435800
call fcn.00406183
push dword [esp + 0x18]
push section..ndata
call fcn.00406183
movzx eax, word [0x40a316]
movzx ecx, word [0x40a314]
shl eax, 0x10
or eax, ecx
push 0x1a
mov dword [0x42b800], eax
pop ebx
mov edi, 0x420f08
mov eax, dword [0x42a270]
push dword [eax + 0x120]
push edi
call fcn.004061a5
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
cmp dword [esp + 0x10], ebp
je 0x403828
push 1
push edi
push 0x438800
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x403828
push ebp
push edi
call fcn.00406024
mov eax, dword [0x42a270]
push dword [eax + 0x124]
push edi
call fcn.004061a5
push edi
call fcn.00405863
cmp eax, ebp
je 0x403828
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebp
inc word [0x42b800]
dec ebx
jne 0x4037cb
push ebp
push esi
call fcn.00406024
jmp 0x403707
cmp dword [0x42a2f4], ebp
je 0x4038c2
lea eax, [esp + 0x10]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
test eax, eax
je 0x403892
lea eax, [esp + 0x1c]
push eax
push str.SeShutdownPrivilege
push ebp
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
push ebp
push ebp
lea eax, [esp + 0x20]
push ebp
push eax
push ebp
push dword [esp + 0x24]
mov dword [esp + 0x30], 1
mov dword [esp + 0x3c], 2
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.00406559
cmp eax, ebp
mov esi, 0x80040002
je 0x4038ae
push esi
push 0x25
push ebp
push ebp
push ebp
call eax
test eax, eax
je 0x4038bb
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x4038c2
push 9
call fcn.0040140b
mov eax, dword [0x42a30c]
cmp eax, 0xffffffff
je 0x4038d0
mov dword [esp + 0xc], eax
push dword [esp + 0xc]
call dword [sym.imp.KERNEL32.dll_ExitProcess]