Function at 0x403235
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, 0x184
push ebx
push esi
push edi
xor ebx, ebx
push 0x8001
mov dword [esp + 0x18], ebx
mov dword [esp + 0x10], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0x20], ebx
mov byte [esp + 0x14], 0x20
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
call dword [sym.imp.KERNEL32.dll_GetVersion]
and eax, 0xbfffffff
cmp ax, 6
mov dword [0x42370c], eax
je 0x403287
push ebx
call fcn.00406372
cmp eax, ebx
je 0x403287
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.00406304
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], bl
jne 0x40328c
push 0xa
call fcn.00406372
push 8
call fcn.00406372
push 6
mov dword [0x423704], eax
call fcn.00406372
cmp eax, ebx
je 0x4032ce
push 0x1e
call eax
test eax, eax
je 0x4032ce
or byte [0x42370f], 0x40
push ebp
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x4237d8], eax
push ebx
lea eax, [esp + 0x38]
push 0x160
push eax
push ebx
push 0x41ecc8
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x422f00
call fcn.00405fda
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov ebp, 0x429000
push eax
push ebp
call fcn.00405fda
cmp byte [0x429000], 0x22
mov dword [0x423700], 0x400000
mov eax, ebp
jne 0x403338
mov byte [esp + 0x14], 0x22
mov eax, 0x429001
push dword [esp + 0x14]
push eax
call fcn.0040599d
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
jmp 0x403412
cmp cl, 0x20
jne 0x40335d
inc eax
cmp byte [eax], 0x20
je 0x403357
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x40336d
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x403402
inc eax
cmp byte [eax], 0x53
jne 0x403392
mov cl, byte [eax + 1]
cmp cl, 0x20
je 0x403388
cmp cl, bl
jne 0x403392
mov dword [0x4237c0], 1
movsx ecx, byte [0x409183]
movsx edx, byte [0x409182]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x409181]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.NCRC]
shl ecx, 8
or ecx, edx
cmp dword [eax], ecx
jne 0x4033d2
mov cl, byte [eax + 4]
cmp cl, 0x20
je 0x4033cd
cmp cl, bl
jne 0x4033d2
or dword [esp + 0x20], 4
movsx ecx, byte [0x40917b]
movsx edx, byte [0x40917a]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x409179]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.__D]
shl ecx, 8
or ecx, edx
cmp dword [eax - 2], ecx
je 0x40341e
push dword [esp + 0x14]
push eax
call fcn.0040599d
cmp byte [eax], 0x22
jne 0x403412
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x403352
jmp 0x40342f
mov byte [eax - 2], bl
add eax, 2
push eax
push 0x429400
call fcn.00405fda
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathA]
mov esi, 0x42a400
push esi
push 0x400
call edi
call fcn.00403204
test eax, eax
jne 0x4034a1
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatA
call fcn.00403204
test eax, eax
jne 0x4034a1
push esi
push 0x3fc
call edi
push 0x40916c
push esi
call sub.KERNEL32.dll_lstrcatA
mov edi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableA]
push esi
push str.TEMP
call edi
push esi
push 0x409160
call edi
call fcn.00403204
test eax, eax
je 0x40354f
push 0x42a000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push dword [esp + 0x20]
call fcn.00402dc4
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x40354f
cmp dword [0x423720], ebx
je 0x40353f
push ebx
push ebp
call fcn.0040599d
mov edi, eax
cmp edi, ebp
jb 0x40350a
movsx eax, byte [0x40915b]
movsx ecx, byte [0x40915a]
shl eax, 8
or eax, ecx
movsx ecx, byte [0x409159]
shl eax, 8
or eax, ecx
movsx ecx, byte [str.___]
shl eax, 8
or eax, ecx
cmp dword [edi], eax
je 0x40350a
dec edi
cmp edi, ebp
jae 0x403501
cmp edi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x40357b
mov byte [edi], bl
add edi, 4
push edi
call fcn.00405a60
test eax, eax
je 0x40354f
push edi
push 0x429400
call fcn.00405fda
push edi
push 0x429800
call fcn.00405fda
mov dword [esp + 0x10], ebx
or dword [0x4237cc], 0xffffffff
call fcn.004037f7
mov dword [esp + 0x18], eax
call fcn.0040371d
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x403683
push 0x200010
push dword [esp + 0x10]
call fcn.004056f6
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.00405661
push str.nsu
push esi
mov edi, eax
call sub.KERNEL32.dll_lstrcatA
cmp edi, ebx
je 0x40359c
push 0x40914c
push esi
call sub.KERNEL32.dll_lstrcatA
push str..tmp
push esi
call sub.KERNEL32.dll_lstrcatA
mov ebp, 0x429c00
push ebp
push esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x40354f
cmp edi, ebx
push esi
je 0x4035c4
call fcn.004055c7
jmp 0x4035c9
call fcn.00405644
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x429400], bl
jne 0x4035e3
push ebp
push 0x429400
call fcn.00405fda
push dword [esp + 0x1c]
push section..ndata
call fcn.00405fda
movsx cx, byte [0x409140]
xor eax, eax
push 0x1a
mov ah, byte [0x409141]
pop ebp
or eax, ecx
mov edi, 0x41e8c8
mov word [0x424400], ax
mov eax, dword [0x423714]
push dword [eax + 0x120]
push edi
call fcn.00405ffc
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x40366e
push 1
push edi
push 0x42ac00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x40366e
push ebx
push edi
call fcn.00405db9
mov eax, dword [0x423714]
push dword [eax + 0x124]
push edi
call fcn.00405ffc
push edi
call fcn.00405679
cmp eax, ebx
je 0x40366e
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x424400]
dec ebp
jne 0x403611
push ebx
push esi
call fcn.00405db9
jmp 0x40354f
cmp dword [0x4237b4], ebx
je 0x403705
lea eax, [esp + 0x18]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
push 2
test eax, eax
pop edi
je 0x4036d6
lea eax, [esp + 0x24]
push eax
push str.SeShutdownPrivilege
push ebx
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueA]
push ebx
push ebx
lea eax, [esp + 0x28]
push ebx
push eax
push ebx
push dword [esp + 0x2c]
mov dword [esp + 0x38], 1
mov dword [esp + 0x44], edi
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.00406372
cmp eax, ebx
mov esi, 0x80040002
je 0x4036f2
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x4036fe
push esi
push edi
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403705
push 9
call fcn.0040140b
mov eax, dword [0x4237cc]
cmp eax, 0xffffffff
je 0x403713
mov dword [esp + 0x14], eax
push dword [esp + 0x14]
call dword [sym.imp.KERNEL32.dll_ExitProcess]