Function at 0x4034f0
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, 0x218
push ebx
push ebp
push esi
push edi
xor ebx, ebx
mov edi, str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
push 0x8001
mov dword [esp + 0x14], ebx
mov ebp, ebx
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
mov esi, dword [sym.imp.KERNEL32.dll_GetVersionExA]
lea eax, [esp + 0x2c]
xorps xmm0, xmm0
mov dword [esp + 0x40], ebx
push eax
movlpd qword [esp + 0xc4], xmm0
mov dword [esp + 0x30], 0x9c
call esi
test eax, eax
jne 0x40357a
lea eax, [esp + 0x2c]
mov dword [esp + 0x2c], 0x94
push eax
call esi
mov eax, dword [esp + 0x3c]
cmp eax, 2
jne 0x403581
cmp byte [esp + 0x40], 0x53
mov byte [esp + 0xc6], 4
jne 0x40356e
movsx ax, byte [esp + 0x4d]
sub ax, 0x30
jmp 0x40359c
xor ecx, ecx
mov word [esp + 0xc0], cx
jmp 0x40357e
mov eax, dword [esp + 0x3c]
cmp eax, 2
jae 0x4035a4
mov al, byte [esp + 0x41]
mov byte [esp + 0xc6], bl
cmp al, 0x41
jl 0x40359a
cbw
sub ax, 0x40
jmp 0x40359c
xor eax, eax
mov word [esp + 0xc0], ax
cmp dword [esp + 0x30], 0xa
jae 0x4035b6
movzx eax, word [esp + 0x38]
mov dword [esp + 0x38], eax
jmp 0x4035ba
mov eax, dword [esp + 0x38]
mov dword [0x42f1d8], eax
movzx eax, byte [esp + 0x30]
shl ax, 8
movzx ecx, ax
movzx eax, byte [esp + 0x34]
or ecx, eax
movzx eax, byte [esp + 0xc0]
shl ax, 8
shl ecx, 0x10
movzx eax, ax
or ecx, eax
movzx eax, byte [esp + 0xc6]
or ecx, eax
mov eax, 0x600
mov dword [0x42f1dc], ecx
sar ecx, 0x10
cmp cx, ax
je 0x403614
push ebx
call fcn.00406574
test eax, eax
je 0x403614
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.00405ed9
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
inc esi
add esi, eax
cmp byte [esi], bl
jne 0x403619
push 0xc
call fcn.00406574
push 0xa
call fcn.00406574
push 8
mov dword [0x42e8d0], eax
call fcn.00406574
test eax, eax
je 0x40365a
push 0x1e
call eax
test eax, eax
je 0x40365a
or byte [0x42f1dc], 0x80
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
push ebx
push 0x160
mov dword [0x42f140], eax
lea eax, [esp + 0xd0]
push eax
push ebx
push 0x40844b
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x42e8e0
call fcn.00406799
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
push eax
mov ebx, 0x435000
push ebx
call fcn.00406799
cmp byte [0x435000], 0x22
mov edx, 0x435001
mov dword [0x42e8d4], 0x400000
sete al
lea eax, [eax*2 + 0x20]
push eax
mov eax, ebx
cmove eax, edx
push eax
call fcn.00406273
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov ecx, eax
mov dword [esp + 0x14], ecx
jmp 0x403758
inc ecx
mov dl, byte [ecx]
cmp dl, 0x20
je 0x4036e2
mov byte [esp + 0x18], 0x20
mov bl, dl
cmp dl, 0x22
jne 0x4036fd
mov bl, byte [ecx + 1]
mov byte [esp + 0x18], dl
lea eax, [ecx + 1]
cmovne eax, ecx
cmp bl, 0x2f
jne 0x403744
inc eax
cmp byte [eax], 0x53
jne 0x403724
mov cl, byte [eax + 1]
cmp cl, 0x20
je 0x40371a
test cl, cl
jne 0x403724
mov dword [0x42f1c0], 1
cmp dword [eax], 0x4352434e
jne 0x40373b
mov cl, byte [eax + 4]
cmp cl, 0x20
je 0x403738
test cl, cl
jne 0x40373b
or ebp, 4
cmp dword [eax - 2], 0x3d442f20
je 0x403760
push dword [esp + 0x18]
push eax
call fcn.00406273
mov ecx, eax
mov dl, byte [ecx]
cmp dl, 0x22
jne 0x40375a
inc ecx
mov dl, byte [ecx]
test dl, dl
jne 0x4036e5
jmp 0x403772
mov byte [eax - 2], 0
add eax, 2
push eax
push 0x435400
call fcn.00406799
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathA]
mov ebx, 0x436400
push ebx
push 0x400
call esi
call fcn.00403a45
test eax, eax
jne 0x4037e4
push 0x3fb
push ebx
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push ebx
call sub.KERNEL32.dll_lstrcatA
call fcn.00403a45
test eax, eax
jne 0x4037e4
push ebx
push 0x3fc
call esi
push 0x408460
push ebx
call sub.KERNEL32.dll_lstrcatA
mov esi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableA]
push ebx
push str.TEMP
call esi
push ebx
push 0x40846c
call esi
call fcn.00403a45
test eax, eax
je 0x40397d
mov ebx, dword [sym.imp.KERNEL32.dll_DeleteFileA]
push 0x436000
call ebx
push ebp
call fcn.004031e4
mov edi, eax
test edi, edi
jne 0x40397d
cmp dword [0x42f0e4], eax
je 0x40385b
push eax
mov ebp, 0x435000
push ebp
call fcn.00406273
mov esi, eax
jmp 0x403822
cmp dword [esi], 0x3d3f5f20
je 0x403826
dec esi
cmp esi, ebp
jae 0x403819
mov edi, str.Error_launching_installer
cmp esi, ebp
jb 0x40386e
mov byte [esi], 0
add esi, 4
push esi
call fcn.004062b0
test eax, eax
je 0x40397d
push esi
push 0x435400
call fcn.00406799
push esi
push 0x435800
call fcn.00406799
xor edi, edi
or dword [0x42f1cc], 0xffffffff
call fcn.00405731
mov ebx, eax
jmp 0x403981
call fcn.0040617b
push str.nsu
mov ebp, 0x436400
mov esi, eax
push ebp
call sub.KERNEL32.dll_lstrcatA
test esi, esi
je 0x403894
push 0x408478
push ebp
call sub.KERNEL32.dll_lstrcatA
push str..tmp
push ebp
call sub.KERNEL32.dll_lstrcatA
push 0x435c00
push ebp
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x40397d
push ebp
test esi, esi
je 0x4038bf
call fcn.00405b5a
jmp 0x4038c4
call fcn.00405b3a
push ebp
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x435400], 0
jne 0x4038e3
push 0x435c00
push 0x435400
call fcn.00406799
push dword [esp + 0x14]
push section..ndata
call fcn.00406799
push 0x41
pop eax
push 0x1a
mov word [0x430400], ax
pop esi
mov eax, dword [0x42f0f0]
push dword [eax + 0x120]
push 0x429118
call fcn.00405bd6
push 0x429118
call ebx
test edi, edi
je 0x40396b
push 1
push 0x429118
push 0x436c00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x40396b
push 0
push 0x429118
call fcn.00405f74
mov eax, dword [0x42f0f0]
push dword [eax + 0x124]
push 0x429118
call fcn.00405bd6
push 0x429118
call fcn.00406349
test eax, eax
je 0x40396b
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
xor edi, edi
inc byte [0x430400]
sub esi, 1
jne 0x4038fd
push esi
push ebp
call fcn.00405f74
mov ebx, dword [esp + 0x10]
call fcn.004034c6
call dword [sym.imp.ole32.dll_OleUninitialize]
test edi, edi
je 0x4039a3
push 0x200010
push edi
call fcn.00406727
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
cmp dword [0x42f1b4], 0
je 0x403a31
lea eax, [esp + 0x14]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
test eax, eax
je 0x4039ff
lea eax, [esp + 0x20]
push eax
push str.SeShutdownPrivilege
push 0
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueA]
xor ecx, ecx
mov dword [esp + 0x1c], 1
push ecx
push ecx
push ecx
lea eax, [esp + 0x28]
mov dword [esp + 0x34], 2
push eax
push ecx
push dword [esp + 0x28]
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.00406574
mov esi, 0x80040002
test eax, eax
je 0x403a1d
push esi
push 0x25
xor ecx, ecx
push ecx
push ecx
push ecx
call eax
test eax, eax
je 0x403a2a
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403a31
push 9
call fcn.00401533
cmp dword [0x42f1cc], 0xffffffff
cmovne ebx, dword [0x42f1cc]
push ebx
jmp 0x40399d