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 ebx
push esi
push edi
push 0x20
pop edi
xor 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]
cmp ax, 6
je 0x4033fc
push ebx
call fcn.00406558
cmp eax, ebx
je 0x4033fc
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.004064e8
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], 0
jne 0x403401
push ebp
push 9
call fcn.00406558
push 7
call fcn.00406558
mov dword [0x42a244], eax
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x42a2f8], eax
push ebx
lea eax, [esp + 0x34]
push 0x2b4
push eax
push ebx
push 0x4216e8
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x429240
call fcn.0040617e
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
mov ebp, 0x435000
push eax
push ebp
call fcn.0040617e
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
cmp word [0x435000], 0x22
mov dword [0x42a240], eax
mov eax, ebp
jne 0x403495
push 0x22
mov eax, 0x435002
pop edi
push edi
push eax
call fcn.00405b5f
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 0x4035c6
push 0x20
pop ebx
cmp ax, bx
jne 0x4034c4
inc ecx
inc ecx
cmp word [ecx], bx
je 0x4034bd
cmp word [ecx], 0x22
jne 0x4034cf
inc ecx
push 0x22
inc ecx
pop ebx
cmp word [ecx], 0x2f
jne 0x403592
inc ecx
inc ecx
cmp word [ecx], 0x53
jne 0x4034fa
mov ax, word [ecx + 2]
cmp ax, 0x20
je 0x4034f0
test ax, ax
jne 0x4034fa
mov dword [0x42a2e0], 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 0x403550
mov eax, dword [ecx + 4]
cmp eax, edi
jne 0x403550
mov ax, word [ecx + 8]
cmp ax, 0x20
je 0x40354b
test ax, ax
jne 0x403550
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 0x403592
mov eax, dword [ecx]
cmp eax, edi
je 0x4035b1
push ebx
push ecx
call fcn.00405b5f
mov ecx, eax
cmp word [ecx], 0x22
jne 0x4035a3
inc ecx
inc ecx
mov ax, word [ecx]
test ax, ax
jne 0x4034b5
jmp 0x4035c4
and word [ecx - 4], 0
add ecx, 4
push ecx
push 0x435800
call fcn.0040617e
xor ebx, ebx
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
mov esi, 0x437800
push esi
push 0x400
call edi
call fcn.00403385
test eax, eax
jne 0x403638
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 0x403638
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 0x403703
push 0x437000
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push dword [esp + 0x1c]
call fcn.00402e41
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x403703
cmp dword [0x42a25c], ebx
je 0x4036f3
push ebx
push ebp
call fcn.00405b5f
mov edi, eax
cmp edi, ebp
jb 0x4036bd
movzx eax, word [0x40a33e]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov ebx, eax
movzx eax, word [0x40a33c]
movzx ecx, word [0x40a338]
cdq
or ebx, eax
movzx eax, word [0x40a33a]
shl eax, 0x10
or eax, ecx
xor ecx, ecx
cdq
or ecx, eax
mov eax, ebx
or eax, edx
mov edx, dword [edi]
cmp edx, ecx
jne 0x4036b5
mov edx, dword [edi + 4]
cmp edx, eax
je 0x4036bb
dec edi
dec edi
cmp edi, ebp
jae 0x4036a8
xor ebx, ebx
cmp edi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x40372f
mov word [edi], bx
add edi, 8
push edi
call fcn.00405c3a
test eax, eax
je 0x403703
push edi
push 0x435800
call fcn.0040617e
push edi
push 0x436000
call fcn.0040617e
mov dword [esp + 0x10], ebx
or dword [0x42a2ec], 0xffffffff
call fcn.004039c7
mov dword [esp + 0x14], eax
call fcn.004038d5
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x403839
push 0x200010
push dword [esp + 0x10]
call fcn.004058c3
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.00405846
push 0x40a32c
push esi
mov edi, eax
call sub.KERNEL32.dll_lstrcatW
cmp edi, ebx
je 0x403750
push 0x40a328
push esi
call sub.KERNEL32.dll_lstrcatW
push str..tmp
push esi
call sub.KERNEL32.dll_lstrcatW
mov ebp, 0x436800
push ebp
push esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
test eax, eax
je 0x403703
cmp edi, ebx
push esi
je 0x403778
call fcn.004057ac
jmp 0x40377d
call fcn.00405829
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
cmp word [0x435800], bx
jne 0x403798
push ebp
push 0x435800
call fcn.0040617e
push dword [esp + 0x18]
push section..ndata
call fcn.0040617e
movzx eax, word [0x40a316]
movzx ecx, word [0x40a314]
shl eax, 0x10
or eax, ecx
push 0x1a
mov dword [0x42b800], eax
pop ebp
mov edi, 0x420ee8
mov eax, dword [0x42a250]
push dword [eax + 0x120]
push edi
call fcn.004061a0
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
cmp dword [esp + 0x10], ebx
je 0x403823
push 1
push edi
push 0x438800
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x403823
push ebx
push edi
call fcn.0040601f
mov eax, dword [0x42a250]
push dword [eax + 0x124]
push edi
call fcn.004061a0
push edi
call fcn.0040585e
cmp eax, ebx
je 0x403823
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc word [0x42b800]
dec ebp
jne 0x4037c6
push ebx
push esi
call fcn.0040601f
jmp 0x403703
cmp dword [0x42a2d4], ebx
je 0x4038bd
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 0x40388d
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.00406558
cmp eax, ebx
mov esi, 0x80040002
je 0x4038a9
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x4038b6
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x4038bd
push 9
call fcn.0040140b
mov eax, dword [0x42a2ec]
cmp eax, 0xffffffff
je 0x4038cb
mov dword [esp + 0x10], eax
push dword [esp + 0x10]
call dword [sym.imp.KERNEL32.dll_ExitProcess]