Function at 0x4034d1
Capabilities:
Accept command line arguments
Check os version
Copy file
Delete file
Get common file path
Get file attributes
Get file system object information
Set current directory
Set environment variable
Shutdown system
Terminate process

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x224
push esi
push edi
xor edi, edi
push 0x8001
mov dword [ebp - 0x14], edi
mov dword [ebp - 0xc], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [ebp - 8], edi
mov byte [ebp - 4], 0x20
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
mov esi, dword [sym.imp.KERNEL32.dll_GetVersionExA]
lea eax, [ebp - 0xc4]
push eax
mov dword [ebp - 0xb0], edi
mov dword [ebp - 0x30], edi
mov dword [ebp - 0x2c], edi
mov dword [ebp - 0xc4], 0x9c
call esi
test eax, eax
jne 0x403562
lea eax, [ebp - 0xc4]
mov dword [ebp - 0xc4], 0x94
push eax
call esi
cmp dword [ebp - 0xb4], 2
jne 0x403569
movsx cx, byte [ebp - 0xa3]
mov al, byte [ebp - 0xb0]
sub ecx, 0x30
sub al, 0x53
mov byte [ebp - 0x2a], 4
neg al
sbb eax, eax
not eax
and eax, ecx
mov word [ebp - 0x30], ax
cmp dword [ebp - 0xb4], 2
jae 0x40358d
and byte [ebp - 0x2a], 0
cmp byte [ebp - 0xaf], 0x41
jl 0x403589
movsx ax, byte [ebp - 0xaf]
sub eax, 0x40
mov word [ebp - 0x30], ax
jmp 0x40358d
mov word [ebp - 0x30], di
cmp dword [ebp - 0xc0], 0xa
jae 0x40359e
and word [ebp - 0xb6], 0
mov eax, dword [ebp - 0xb8]
movzx ecx, byte [ebp - 0xbc]
mov dword [0x4243f8], eax
xor eax, eax
mov ah, byte [ebp - 0xc0]
movzx eax, ax
or eax, ecx
xor ecx, ecx
mov ch, byte [ebp - 0x30]
movzx ecx, cx
shl eax, 0x10
or eax, ecx
movzx ecx, byte [ebp - 0x2a]
or eax, ecx
mov dword [0x4243fc], eax
cmp word [0x4243fe], 0x600
je 0x4035f1
push edi
call fcn.004067c6
cmp eax, edi
je 0x4035f1
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.00406758
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], 0
jne 0x4035f6
push 0xc
call fcn.004067c6
push 0xa
call fcn.004067c6
push 8
mov dword [0x424344], eax
call fcn.004067c6
cmp eax, edi
je 0x403639
push 0x1e
call eax
test eax, eax
je 0x403639
or byte [0x4243fc], 0x80
push ebx
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push edi
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x424400], eax
push edi
lea eax, [ebp - 0x224]
push 0x160
push eax
push edi
push 0x41f910
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x423b40
call fcn.0040639e
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov ebx, 0x42a000
push eax
push ebx
call fcn.0040639e
cmp byte [0x42a000], 0x22
mov dword [0x424340], 0x400000
mov eax, ebx
jne 0x4036a4
mov byte [ebp - 4], 0x22
mov eax, 0x42a001
push dword [ebp - 4]
push eax
call fcn.00405d5b
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [ebp - 0x10], eax
jmp 0x403778
cmp cl, 0x20
jne 0x4036c7
inc eax
cmp byte [eax], 0x20
je 0x4036c1
cmp byte [eax], 0x22
mov byte [ebp - 4], 0x20
jne 0x4036d5
inc eax
mov byte [ebp - 4], 0x22
cmp byte [eax], 0x2f
jne 0x403769
inc eax
cmp byte [eax], 0x53
jne 0x4036fa
mov cl, byte [eax + 1]
cmp cl, 0x20
je 0x4036f0
test cl, cl
jne 0x4036fa
mov dword [0x4243e0], 1
movsx ecx, byte [0x40a1db]
movsx edx, byte [0x40a1da]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x40a1d9]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.NCRC]
shl ecx, 8
or ecx, edx
cmp dword [eax], ecx
jne 0x403739
mov cl, byte [eax + 4]
cmp cl, 0x20
je 0x403735
test cl, cl
jne 0x403739
or dword [ebp - 8], 4
movsx ecx, byte [0x40a1d3]
movsx edx, byte [0x40a1d2]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x40a1d1]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.__D]
shl ecx, 8
or ecx, edx
cmp dword [eax - 2], ecx
je 0x403784
push dword [ebp - 4]
push eax
call fcn.00405d5b
cmp byte [eax], 0x22
jne 0x403778
inc eax
mov cl, byte [eax]
test cl, cl
jne 0x4036bc
jmp 0x403796
and byte [eax - 2], 0
add eax, 2
push eax
push 0x42a400
call fcn.0040639e
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathA]
mov esi, 0x42b400
push esi
push 0x400
call edi
call fcn.004034a0
test eax, eax
jne 0x403808
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatA
call fcn.004034a0
test eax, eax
jne 0x403808
push esi
push 0x3fc
call edi
push 0x40a1c4
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 0x40a1b8
call edi
call fcn.004034a0
test eax, eax
je 0x4038b3
push 0x42b000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push dword [ebp - 8]
call fcn.00402f61
test eax, eax
mov dword [ebp - 0xc], eax
jne 0x4038b3
cmp dword [0x42435c], eax
je 0x4038a4
push eax
push ebx
call fcn.00405d5b
mov edi, eax
cmp edi, ebx
jb 0x40386f
movsx eax, byte [0x40a1b3]
movsx ecx, byte [0x40a1b2]
shl eax, 8
or eax, ecx
movsx ecx, byte [0x40a1b1]
shl eax, 8
or eax, ecx
movsx ecx, byte [str.___]
shl eax, 8
or eax, ecx
cmp dword [edi], eax
je 0x40386f
dec edi
cmp edi, ebx
jae 0x403866
cmp edi, ebx
mov dword [ebp - 0xc], str.Error_launching_installer
jb 0x4038df
and byte [edi], 0
add edi, 4
push edi
call fcn.00405e1e
test eax, eax
je 0x4038b3
push edi
push 0x42a400
call fcn.0040639e
push edi
push 0x42a800
call fcn.0040639e
and dword [ebp - 0xc], 0
or dword [0x4243ec], 0xffffffff
call fcn.00403ba7
mov dword [ebp - 0x14], eax
call fcn.00403ab5
call dword [sym.imp.ole32.dll_OleUninitialize]
xor edi, edi
pop ebx
cmp dword [ebp - 0xc], edi
je 0x403a21
push 0x200010
push dword [ebp - 0xc]
call fcn.00405ab4
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.00405a1f
push esi
mov dword [ebp - 0x18], eax
call sub.KERNEL32.dll_lstrlenA
push dword [ebp - 0x10]
mov edi, eax
push section..ndata
call fcn.0040639e
cmp byte [0x42a400], 0
jne 0x403914
push 0x42ac00
push 0x42a400
call fcn.0040639e
lea eax, [edi + 0x42b400]
mov dword [ebp - 8], 1
mov dword [ebp - 0x10], eax
mov edi, 0x426400
mov ebx, 0x426800
and dword [ebp - 4], 0
movzx eax, word [ebp - 8]
push eax
push str.nsu_X.tmp
push dword [ebp - 0x10]
call dword [sym.imp.USER32.dll_wsprintfA]
mov eax, dword [0x424350]
add esp, 0xc
push dword [eax + 0x120]
push edi
call fcn.00406431
cmp dword [ebp - 0x18], 0
push esi
je 0x403967
call fcn.004059a8
jmp 0x40396c
call fcn.00405a02
test eax, eax
je 0x4039a8
push edi
call dword [sym.imp.KERNEL32.dll_GetFileAttributesA]
test ah, 4
jne 0x403999
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
test eax, eax
je 0x403999
push 1
push esi
call fcn.00405b60
mov eax, dword [ebp - 4]
inc dword [ebp - 4]
test eax, eax
je 0x403932
inc dword [ebp - 8]
cmp word [ebp - 8], 0
jne 0x40392e
jmp 0x4038b3
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
push 0
push esi
call fcn.00406177
push 1
push edi
push 0x42bc00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x4038b3
push 0
push edi
call fcn.00406177
mov eax, dword [0x424350]
push dword [eax + 0x124]
push ebx
call fcn.00406431
push ebx
call fcn.00405a37
test eax, eax
jne 0x403a11
mov eax, dword [ebp - 4]
inc dword [ebp - 4]
test eax, eax
jne 0x4038b3
push edi
call fcn.00406731
test eax, eax
je 0x403932
jmp 0x4038b3
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
and dword [ebp - 0xc], 0
jmp 0x4038b3
cmp dword [0x4243d4], edi
je 0x403a9f
lea eax, [ebp - 0x18]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
test eax, eax
je 0x403a6f
lea eax, [ebp - 0x24]
push eax
push str.SeShutdownPrivilege
push edi
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueA]
push edi
push edi
lea eax, [ebp - 0x28]
push edi
push eax
push edi
push dword [ebp - 0x18]
mov dword [ebp - 0x28], 1
mov dword [ebp - 0x1c], 2
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.004067c6
cmp eax, edi
mov esi, 0x80040002
je 0x403a8b
push esi
push 0x25
push edi
push edi
push edi
call eax
test eax, eax
je 0x403a98
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403a9f
push 9
call fcn.0040140b
mov eax, dword [0x4243ec]
cmp eax, 0xffffffff
je 0x403aac
mov dword [ebp - 0x14], eax
push dword [ebp - 0x14]
call dword [sym.imp.KERNEL32.dll_ExitProcess]