Function at 0x403576
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 0x8001
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 0x4035bf
push ebx
call fcn.00406681
cmp eax, ebx
je 0x4035bf
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.00406613
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], bl
jne 0x4035c4
push 0xd
call fcn.00406681
push 0xb
call fcn.00406681
mov dword [0x4263c4], eax
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x426478], eax
push ebx
lea eax, [esp + 0x38]
push 0x160
push eax
push ebx
push 0x420d70
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x425bc0
call fcn.00406144
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov ebp, 0x42c000
push eax
push ebp
call fcn.00406144
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x42c000], 0x22
mov dword [0x4263c0], eax
mov eax, ebp
jne 0x403657
mov byte [esp + 0x14], 0x22
mov eax, 0x42c001
push dword [esp + 0x14]
push eax
call fcn.00405c62
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x20], eax
jmp 0x4036d5
cmp cl, 0x20
jne 0x403679
inc eax
cmp byte [eax], 0x20
je 0x403673
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x403689
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x4036c5
inc eax
cmp byte [eax], 0x53
jne 0x4036a4
mov cl, byte [eax + 1]
or cl, 0x20
cmp cl, 0x20
jne 0x4036a4
or dword [esp + 0x18], 2
cmp dword [eax], 0x4352434e
jne 0x4036bc
mov cl, byte [eax + 4]
or cl, 0x20
cmp cl, 0x20
jne 0x4036bc
or dword [esp + 0x18], 4
cmp dword [eax - 2], 0x3d442f20
je 0x4036dd
push dword [esp + 0x14]
push eax
call fcn.00405c62
cmp byte [eax], 0x22
jne 0x4036d5
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x40366e
jmp 0x4036ee
mov dword [eax - 2], ebx
add eax, 2
push eax
push 0x42c400
call fcn.00406144
mov edi, 0x42d400
push edi
push 0x400
call dword [sym.imp.KERNEL32.dll_GetTempPathA]
call fcn.00403545
test eax, eax
jne 0x40372c
push 0x3fb
push edi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push edi
call sub.KERNEL32.dll_lstrcatA
call fcn.00403545
test eax, eax
je 0x4037b4
push 0x42d000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push dword [esp + 0x18]
call fcn.004030d0
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x4037b4
cmp dword [0x4263dc], ebx
je 0x40379d
push ebx
push ebp
call fcn.00405c62
mov esi, eax
jmp 0x403764
cmp dword [esi], 0x3d3f5f20
je 0x403768
dec esi
cmp esi, ebp
jae 0x40375b
cmp esi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x4037df
mov byte [esi], bl
add esi, 4
push esi
call fcn.00405d18
test eax, eax
je 0x4037b4
push esi
push 0x42c400
call fcn.00406144
push esi
push 0x42c800
call fcn.00406144
mov dword [esp + 0x10], ebx
or dword [0x42646c], 0xffffffff
call fcn.00403a8e
push 1
mov dword [esp + 0x20], eax
call fcn.0040643f
call fcn.00403993
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
je 0x4038d8
push 0x200010
push dword [esp + 0x14]
call fcn.004059ac
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.00405933
push str.nsu
push edi
mov esi, eax
call sub.KERNEL32.dll_lstrcatA
cmp esi, ebx
je 0x403800
push 0x40a7c8
push edi
call sub.KERNEL32.dll_lstrcatA
push str..tmp
push edi
call sub.KERNEL32.dll_lstrcatA
mov ebp, 0x42cc00
push ebp
push edi
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x4037b4
cmp esi, ebx
push edi
je 0x403828
call fcn.00405899
jmp 0x40382d
call fcn.00405916
push edi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x42c400], bl
jne 0x403847
push ebp
push 0x42c400
call fcn.00406144
push dword [esp + 0x20]
push section..ndata
call fcn.00406144
push 0x1a
mov word [0x427400], 0x41
pop ebp
mov esi, 0x420970
mov eax, dword [0x4263d0]
push dword [eax + 0x120]
push esi
call fcn.00406166
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x4038c3
push 1
push esi
push 0x42dc00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x4038c3
push ebx
push esi
call fcn.00405e92
mov eax, dword [0x4263d0]
push dword [eax + 0x124]
push esi
call fcn.00406166
push esi
call fcn.0040594b
cmp eax, ebx
je 0x4038c3
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x427400]
dec ebp
jne 0x403866
push ebx
push edi
call fcn.00405e92
jmp 0x4037b4
cmp dword [0x426454], ebx
je 0x40397b
push 5
call fcn.00406681
push 6
mov ebp, eax
call fcn.00406681
push 7
mov esi, eax
call fcn.00406681
cmp ebp, ebx
mov edi, eax
je 0x40394b
cmp esi, ebx
je 0x40394b
cmp edi, ebx
je 0x40394b
lea eax, [esp + 0x20]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call ebp
test eax, eax
je 0x40394b
lea eax, [esp + 0x28]
push eax
push str.SeShutdownPrivilege
push ebx
call esi
push ebx
push ebx
lea eax, [esp + 0x2c]
push ebx
push eax
push ebx
push dword [esp + 0x34]
mov dword [esp + 0x3c], 1
mov dword [esp + 0x48], 2
call edi
push 8
call fcn.00406681
cmp eax, ebx
mov esi, 0x80040002
je 0x403967
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x403974
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x40397b
push 9
call fcn.0040140b
mov eax, dword [0x42646c]
cmp eax, 0xffffffff
je 0x403989
mov dword [esp + 0x1c], eax
push dword [esp + 0x1c]
call dword [sym.imp.KERNEL32.dll_ExitProcess]