Function at 0x40324d
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]
cmp ax, 6
je 0x403295
push ebx
call fcn.0040621e
cmp eax, ebx
je 0x403295
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.004061b0
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], bl
jne 0x40329a
push ebp
push 9
call fcn.0040621e
push 7
call fcn.0040621e
mov dword [0x42f424], eax
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x42f4d8], eax
push ebx
lea eax, [esp + 0x38]
push 0x160
push eax
push ebx
push 0x429850
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x42ec20
call fcn.00405e85
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov ebp, 0x435000
push eax
push ebp
call fcn.00405e85
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x435000], 0x22
mov dword [0x42f420], eax
mov eax, ebp
jne 0x40332e
mov byte [esp + 0x14], 0x22
mov eax, 0x435001
push dword [esp + 0x14]
push eax
call fcn.00405922
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
jmp 0x403408
cmp cl, 0x20
jne 0x403353
inc eax
cmp byte [eax], 0x20
je 0x40334d
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x403363
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x4033f8
inc eax
cmp byte [eax], 0x53
jne 0x403388
mov cl, byte [eax + 1]
cmp cl, 0x20
je 0x40337e
cmp cl, bl
jne 0x403388
mov dword [0x42f4c0], 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 0x4033c8
mov cl, byte [eax + 4]
cmp cl, 0x20
je 0x4033c3
cmp cl, bl
jne 0x4033c8
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 0x403414
push dword [esp + 0x14]
push eax
call fcn.00405922
cmp byte [eax], 0x22
jne 0x403408
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x403348
jmp 0x403425
mov byte [eax - 2], bl
add eax, 2
push eax
push 0x435400
call fcn.00405e85
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathA]
mov esi, 0x436400
push esi
push 0x400
call edi
call fcn.0040321c
test eax, eax
jne 0x403497
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatA
call fcn.0040321c
test eax, eax
jne 0x403497
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.0040321c
test eax, eax
je 0x403545
push 0x436000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push dword [esp + 0x20]
call fcn.00402cb6
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x403545
cmp dword [0x42f43c], ebx
je 0x403535
push ebx
push ebp
call fcn.00405922
mov edi, eax
cmp edi, ebp
jb 0x403500
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 0x403500
dec edi
cmp edi, ebp
jae 0x4034f7
cmp edi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x403571
mov byte [edi], bl
add edi, 4
push edi
call fcn.004059e5
test eax, eax
je 0x403545
push edi
push 0x435400
call fcn.00405e85
push edi
push 0x435800
call fcn.00405e85
mov dword [esp + 0x10], ebx
or dword [0x42f4cc], 0xffffffff
call fcn.00403805
mov dword [esp + 0x18], eax
call fcn.00403713
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x403679
push 0x200010
push dword [esp + 0x10]
call fcn.0040567b
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.004055fe
push str.nsu
push esi
mov edi, eax
call sub.KERNEL32.dll_lstrcatA
cmp edi, ebx
je 0x403592
push 0x40a1b0
push esi
call sub.KERNEL32.dll_lstrcatA
push str..tmp
push esi
call sub.KERNEL32.dll_lstrcatA
mov ebp, 0x435c00
push ebp
push esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x403545
cmp edi, ebx
push esi
je 0x4035ba
call fcn.00405564
jmp 0x4035bf
call fcn.004055e1
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x435400], bl
jne 0x4035d9
push ebp
push 0x435400
call fcn.00405e85
push dword [esp + 0x1c]
push section..ndata
call fcn.00405e85
movsx cx, byte [0x40a1a4]
xor eax, eax
push 0x1a
mov ah, byte [0x40a1a5]
pop ebp
or eax, ecx
mov edi, 0x429450
mov word [0x430400], ax
mov eax, dword [0x42f430]
push dword [eax + 0x120]
push edi
call fcn.00405ea7
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x403664
push 1
push edi
push 0x436c00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x403664
push ebx
push edi
call fcn.00405d40
mov eax, dword [0x42f430]
push dword [eax + 0x124]
push edi
call fcn.00405ea7
push edi
call fcn.00405616
cmp eax, ebx
je 0x403664
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x430400]
dec ebp
jne 0x403607
push ebx
push esi
call fcn.00405d40
jmp 0x403545
cmp dword [0x42f4b4], ebx
je 0x4036fb
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 0x4036cc
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.0040621e
cmp eax, ebx
mov esi, 0x80040002
je 0x4036e8
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x4036f4
push esi
push edi
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x4036fb
push 9
call fcn.0040140b
mov eax, dword [0x42f4cc]
cmp eax, 0xffffffff
je 0x403709
mov dword [esp + 0x14], eax
push dword [esp + 0x14]
call dword [sym.imp.KERNEL32.dll_ExitProcess]