Function at 0x403328
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 [0x42472c], eax
je 0x40337a
push ebx
call fcn.0040646c
cmp eax, ebx
je 0x40337a
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.004063fe
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], bl
jne 0x40337f
push 0xa
call fcn.0040646c
push 8
call fcn.0040646c
push 6
mov dword [0x424724], eax
call fcn.0040646c
cmp eax, ebx
je 0x4033c1
push 0x1e
call eax
test eax, eax
je 0x4033c1
or byte [0x42472f], 0x40
push ebp
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x4247f8], eax
push ebx
lea eax, [esp + 0x38]
push 0x160
push eax
push ebx
push 0x41fcf0
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x423f20
call fcn.004060d4
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov ebp, 0x42a000
push eax
push ebp
call fcn.004060d4
cmp byte [0x42a000], 0x22
mov dword [0x424720], 0x400000
mov eax, ebp
jne 0x40342b
mov byte [esp + 0x14], 0x22
mov eax, 0x42a001
push dword [esp + 0x14]
push eax
call fcn.00405a97
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
jmp 0x403505
cmp cl, 0x20
jne 0x403450
inc eax
cmp byte [eax], 0x20
je 0x40344a
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x403460
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x4034f5
inc eax
cmp byte [eax], 0x53
jne 0x403485
mov cl, byte [eax + 1]
cmp cl, 0x20
je 0x40347b
cmp cl, bl
jne 0x403485
mov dword [0x4247e0], 1
movsx ecx, byte [0x40a1e7]
movsx edx, byte [0x40a1e6]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x40a1e5]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.NCRC]
shl ecx, 8
or ecx, edx
cmp dword [eax], ecx
jne 0x4034c5
mov cl, byte [eax + 4]
cmp cl, 0x20
je 0x4034c0
cmp cl, bl
jne 0x4034c5
or dword [esp + 0x20], 4
movsx ecx, byte [0x40a1df]
movsx edx, byte [0x40a1de]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x40a1dd]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.__D]
shl ecx, 8
or ecx, edx
cmp dword [eax - 2], ecx
je 0x403511
push dword [esp + 0x14]
push eax
call fcn.00405a97
cmp byte [eax], 0x22
jne 0x403505
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x403445
jmp 0x403522
mov byte [eax - 2], bl
add eax, 2
push eax
push 0x42a400
call fcn.004060d4
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathA]
mov esi, 0x42b400
push esi
push 0x400
call edi
call fcn.004032f7
test eax, eax
jne 0x403594
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatA
call fcn.004032f7
test eax, eax
jne 0x403594
push esi
push 0x3fc
call edi
push 0x40a1d0
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 0x40a1c4
call edi
call fcn.004032f7
test eax, eax
je 0x403642
push 0x42b000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push dword [esp + 0x20]
call fcn.00402db3
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x403642
cmp dword [0x424740], ebx
je 0x403632
push ebx
push ebp
call fcn.00405a97
mov edi, eax
cmp edi, ebp
jb 0x4035fd
movsx eax, byte [0x40a1bf]
movsx ecx, byte [0x40a1be]
shl eax, 8
or eax, ecx
movsx ecx, byte [0x40a1bd]
shl eax, 8
or eax, ecx
movsx ecx, byte [str.___]
shl eax, 8
or eax, ecx
cmp dword [edi], eax
je 0x4035fd
dec edi
cmp edi, ebp
jae 0x4035f4
cmp edi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x40366e
mov byte [edi], bl
add edi, 4
push edi
call fcn.00405b5a
test eax, eax
je 0x403642
push edi
push 0x42a400
call fcn.004060d4
push edi
push 0x42a800
call fcn.004060d4
mov dword [esp + 0x10], ebx
or dword [0x4247ec], 0xffffffff
call fcn.00403902
mov dword [esp + 0x18], eax
call fcn.00403810
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x403776
push 0x200010
push dword [esp + 0x10]
call fcn.004057f0
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.0040575b
push str.nsu
push esi
mov edi, eax
call sub.KERNEL32.dll_lstrcatA
cmp edi, ebx
je 0x40368f
push 0x40a1b0
push esi
call sub.KERNEL32.dll_lstrcatA
push str..tmp
push esi
call sub.KERNEL32.dll_lstrcatA
mov ebp, 0x42ac00
push ebp
push esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x403642
cmp edi, ebx
push esi
je 0x4036b7
call fcn.004056c1
jmp 0x4036bc
call fcn.0040573e
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x42a400], bl
jne 0x4036d6
push ebp
push 0x42a400
call fcn.004060d4
push dword [esp + 0x1c]
push section..ndata
call fcn.004060d4
movsx cx, byte [0x40a1a4]
xor eax, eax
push 0x1a
mov ah, byte [0x40a1a5]
pop ebp
or eax, ecx
mov edi, 0x41f8f0
mov word [0x425400], ax
mov eax, dword [0x424734]
push dword [eax + 0x120]
push edi
call fcn.004060f6
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x403761
push 1
push edi
push 0x42bc00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x403761
push ebx
push edi
call fcn.00405eb3
mov eax, dword [0x424734]
push dword [eax + 0x124]
push edi
call fcn.004060f6
push edi
call fcn.00405773
cmp eax, ebx
je 0x403761
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x425400]
dec ebp
jne 0x403704
push ebx
push esi
call fcn.00405eb3
jmp 0x403642
cmp dword [0x4247d4], ebx
je 0x4037f8
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 0x4037c9
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.0040646c
cmp eax, ebx
mov esi, 0x80040002
je 0x4037e5
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x4037f1
push esi
push edi
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x4037f8
push 9
call fcn.0040140b
mov eax, dword [0x4247ec]
cmp eax, 0xffffffff
je 0x403806
mov dword [esp + 0x14], eax
push dword [esp + 0x14]
call dword [sym.imp.KERNEL32.dll_ExitProcess]