Function at 0x40331d
Capabilities:
Accept command line arguments
Check os version
Copy file
Delete file
Get common file path
Get file system object information
Set current directory
Shutdown system
Terminate process

Disassembly:
sub esp, 0x184
push ebx
push ebp
push esi
push edi
xor ebx, ebx
push ExpandEnvironmentStringsA
mov dword [esp + 0x20], ebx
mov dword [esp + 0x14], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0x1c], ebx
mov byte [esp + 0x18], 0x20
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
call dword [sym.imp.KERNEL32.dll_GetVersion]
cmp ax, 6
je 0x403366
push ebx
call fcn.00405b0e
cmp eax, ebx
je 0x403366
push 0xc00
call eax
mov esi, str.uxtheme
push esi
call fcn.00405aa0
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], bl
jne 0x40336b
push 0xd
call fcn.00405b0e
push 0xb
call fcn.00405b0e
mov dword [0x446c00], eax
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
push ebx
push 0x160
mov dword [0x446cf8], eax
lea eax, [esp + 0x3c]
push eax
push ebx
push 0x407437
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x442c00
call fcn.004059bd
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
push eax
mov ebp, 0x46f000
push ebp
call fcn.004059bd
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x46f000], 0x22
mov dword [0x446c08], eax
mov eax, ebp
jne 0x4033fe
mov byte [esp + 0x14], 0x22
mov eax, 0x46f001
push dword [esp + 0x14]
push eax
call fcn.00405697
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x20], eax
jmp 0x40347c
cmp cl, 0x20
jne 0x403420
inc eax
cmp byte [eax], 0x20
je 0x40341a
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x403430
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x40346c
inc eax
cmp byte [eax], 0x53
jne 0x40344b
mov cl, byte [eax + 1]
or cl, 0x20
cmp cl, 0x20
jne 0x40344b
or dword [esp + 0x18], 2
cmp dword [eax], 0x4352434e
jne 0x403463
mov cl, byte [eax + 4]
or cl, 0x20
cmp cl, 0x20
jne 0x403463
or dword [esp + 0x18], 4
cmp dword [eax - 2], 0x3d442f20
je 0x403484
push dword [esp + 0x14]
push eax
call fcn.00405697
cmp byte [eax], 0x22
jne 0x40347c
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x403415
jmp 0x403495
mov dword [eax - 2], ebx
add eax, 2
push eax
push 0x471000
call fcn.004059bd
mov edi, 0x479000
push edi
push 0x2000
call dword [sym.imp.KERNEL32.dll_GetTempPathA]
call fcn.004032c2
test eax, eax
jne 0x4034d3
push 0x1ffb
push edi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push edi
call sub.KERNEL32.dll_lstrcatA
call fcn.004032c2
test eax, eax
je 0x403554
push 0x477000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push dword [esp + 0x18]
call fcn.0040307d
mov dword [esp + 0x10], eax
cmp eax, ebx
jne 0x403554
cmp dword [0x446c64], ebx
je 0x403544
push ebx
push ebp
call fcn.00405697
mov esi, eax
jmp 0x40350b
cmp dword [esi], 0x3d3f5f20
je 0x40350f
dec esi
cmp esi, ebp
jae 0x403502
mov dword [esp + 0x10], str.Error_launching_installer
cmp esi, ebp
jb 0x40357f
mov byte [esi], bl
add esi, 4
push esi
call fcn.00405be7
test eax, eax
je 0x403554
push esi
push 0x471000
jmp 0x51f91a
or dword [0x446cec], 0xffffffff
call fcn.00405263
mov dword [esp + 0x1c], eax
call fcn.004032f3
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
je 0x403678
push 0x200010
push dword [esp + 0x14]
call fcn.00405631
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.00405b7b
push str.nsu
push edi
mov esi, eax
call sub.KERNEL32.dll_lstrcatA
cmp esi, ebx
je 0x4035a0
push 0x407418
push edi
call sub.KERNEL32.dll_lstrcatA
push str..tmp
push edi
call sub.KERNEL32.dll_lstrcatA
mov ebp, 0x475000
push ebp
push edi
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x403554
push edi
cmp esi, ebx
je 0x4035c8
call fcn.00405531
jmp 0x4035cd
call fcn.004055b3
push edi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x471000], bl
jne 0x4035e7
push ebp
push 0x471000
call fcn.004059bd
push dword [esp + 0x20]
push section..ndata
call fcn.004059bd
push 0x41
pop eax
push 0x1a
mov word [0x449000], ax
pop ebp
mov esi, 0x4279c0
mov eax, dword [0x446c0c]
push dword [eax + 0x120]
push esi
call fcn.00405cbf
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x403663
push 1
push esi
push 0x47d000
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x403663
push ebx
push esi
call fcn.00405f1d
mov eax, dword [0x446c0c]
push dword [eax + 0x124]
push esi
call fcn.00405cbf
push esi
call fcn.004055d0
cmp eax, ebx
je 0x403663
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x449000]
dec ebp
jne 0x403606
push ebx
push edi
call fcn.00405f1d
jmp 0x403554
cmp dword [0x446cd4], ebx
je 0x40371b
push 5
call fcn.00405b0e
push 6
mov ebp, eax
call fcn.00405b0e
push 7
mov esi, eax
call fcn.00405b0e
mov edi, eax
cmp ebp, ebx
je 0x4036eb
cmp esi, ebx
je 0x4036eb
cmp edi, ebx
je 0x4036eb
lea eax, [esp + 0x20]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call ebp
test eax, eax
je 0x4036eb
lea eax, [esp + 0x28]
push eax
push str.SeShutdownPrivilege
push ebx
call esi
push ebx
push ebx
push ebx
lea eax, [esp + 0x30]
push eax
push ebx
push dword [esp + 0x34]
mov dword [esp + 0x3c], 1
mov dword [esp + 0x48], 2
call edi
push 8
call fcn.00405b0e
mov esi, 0x80040002
cmp eax, ebx
je 0x403707
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x403714
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x40371b
push 9
call fcn.0040141a
mov eax, dword [0x446cec]
cmp eax, 0xffffffff
je 0x403729
mov dword [esp + 0x1c], eax
push dword [esp + 0x1c]
jmp 0x403579