Function at 0x4034f0
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:
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 [0x42edd8], 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 [0x42eddc], ecx
sar ecx, 0x10
cmp cx, ax
je 0x403614
push ebx
call fcn.004065c8
test eax, eax
je 0x403614
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.00405f2d
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
inc esi
add esi, eax
cmp byte [esi], bl
jne 0x403619
push 0xc
call fcn.004065c8
push 0xa
call fcn.004065c8
push 8
mov dword [0x42e4d0], eax
call fcn.004065c8
test eax, eax
je 0x40365a
push 0x1e
call eax
test eax, eax
je 0x40365a
or byte [0x42eddc], 0x80
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
push ebx
push 0x160
mov dword [0x42ed40], eax
lea eax, [esp + 0xd0]
push eax
push ebx
push 0x40844b
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x42e4e0
call fcn.004067ed
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
push eax
mov ebx, 0x434000
push ebx
call fcn.004067ed
cmp byte [0x434000], 0x22
mov edx, 0x434001
mov dword [0x42e4d4], 0x400000
sete al
lea eax, [eax*2 + 0x20]
push eax
mov eax, ebx
cmove eax, edx
push eax
call fcn.004062c7
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov ecx, eax
mov ebx, ecx
mov dword [esp + 0x18], ebx
mov dl, byte [ecx]
test dl, dl
je 0x403782
jmp 0x4036f1
inc ecx
mov dl, byte [ecx]
cmp dl, 0x20
je 0x4036ee
mov byte [esp + 0x14], 0x20
mov bl, dl
cmp dl, 0x22
jne 0x403709
mov bl, byte [ecx + 1]
mov byte [esp + 0x14], dl
lea eax, [ecx + 1]
cmovne eax, ecx
cmp bl, 0x2f
jne 0x403750
inc eax
cmp byte [eax], 0x53
jne 0x403730
mov cl, byte [eax + 1]
cmp cl, 0x20
je 0x403726
test cl, cl
jne 0x403730
mov dword [0x42edc0], 1
cmp dword [eax], 0x4352434e
jne 0x403747
mov cl, byte [eax + 4]
cmp cl, 0x20
je 0x403744
test cl, cl
jne 0x403747
or ebp, 4
cmp dword [eax - 2], 0x3d442f20
je 0x40376c
push dword [esp + 0x14]
push eax
call fcn.004062c7
mov ecx, eax
mov dl, byte [ecx]
cmp dl, 0x22
jne 0x403766
inc ecx
mov dl, byte [ecx]
test dl, dl
jne 0x4036f1
jmp 0x40377e
mov byte [eax - 2], 0
add eax, 2
push eax
push 0x434400
call fcn.004067ed
mov ebx, dword [esp + 0x18]
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathA]
push 0x435400
push 0x400
call esi
call fcn.00403aba
test eax, eax
jne 0x403808
push 0x3fb
push 0x435400
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push 0x435400
call sub.KERNEL32.dll_lstrcatA
call fcn.00403aba
test eax, eax
jne 0x403808
push 0x435400
push 0x3fc
call esi
push 0x408460
mov esi, 0x435400
push esi
call sub.KERNEL32.dll_lstrcatA
push esi
mov esi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableA]
push str.TEMP
call esi
push 0x435400
push 0x40846c
call esi
call fcn.00403aba
test eax, eax
je 0x4039d5
push 0x435000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push ebp
call fcn.004031e4
mov edi, eax
test edi, edi
jne 0x4039d5
cmp dword [0x42ece4], eax
je 0x40387d
push eax
mov ebp, 0x434000
push ebp
call fcn.004062c7
mov esi, eax
jmp 0x403844
cmp dword [esi], 0x3d3f5f20
je 0x403848
dec esi
cmp esi, ebp
jae 0x40383b
mov edi, str.Error_launching_installer
cmp esi, ebp
jb 0x403890
mov byte [esi], 0
add esi, 4
push esi
call fcn.00406304
test eax, eax
je 0x4039d5
push esi
push 0x434400
call fcn.004067ed
push esi
push 0x434800
call fcn.004067ed
xor edi, edi
or dword [0x42edcc], 0xffffffff
call fcn.004057a6
mov ebx, eax
jmp 0x4039d9
call fcn.004061cf
push 0x435400
mov dword [esp + 0x1c], eax
call sub.KERNEL32.dll_lstrlenA
push ebx
push section..ndata
mov esi, eax
call fcn.004067ed
cmp byte [0x434400], 0
jne 0x4038c8
push 0x434c00
push 0x434400
call fcn.004067ed
xor ebx, ebx
lea eax, [esi + 0x435400]
inc ebx
mov dword [esp + 0x14], eax
xor esi, esi
movzx ebp, bx
push ebp
push str.nsu_X.tmp
push eax
call dword [sym.imp.USER32.dll_wsprintfA]
mov eax, dword [0x42ecf0]
add esp, 0xc
push dword [eax + 0x120]
push 0x430400
call fcn.00405c2a
cmp dword [esp + 0x18], 0
push 0x435400
je 0x403912
call fcn.00405bcf
jmp 0x403917
call fcn.00405baf
test eax, eax
je 0x403964
push 0x430400
call dword [sym.imp.KERNEL32.dll_GetFileAttributesA]
test eax, 0x400
jne 0x4039fb
push 0x430400
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
test eax, eax
je 0x4039fb
push 1
push 0x435400
call fcn.004063e0
mov eax, esi
inc esi
test eax, eax
jne 0x4039fb
mov eax, dword [esp + 0x14]
jmp 0x4038da
push 0x435400
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
push 0
push 0x435400
call fcn.00405fc8
push 1
push 0x430400
push 0x435c00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x4039d5
push 0
push 0x430400
call fcn.00405fc8
mov eax, dword [0x42ecf0]
push dword [eax + 0x124]
push 0x430800
call fcn.00405c2a
push 0x430800
call fcn.0040639d
test eax, eax
jne 0x403a0b
mov eax, esi
inc esi
test eax, eax
jne 0x4039d5
push 0x430400
call fcn.004062a0
test eax, eax
je 0x40395b
mov ebx, dword [esp + 0x10]
call fcn.004034c6
call dword [sym.imp.ole32.dll_OleUninitialize]
test edi, edi
je 0x403a18
push 0x200010
push edi
call fcn.0040677b
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
mov eax, dword [esp + 0x14]
inc ebx
test bx, bx
jne 0x4038d5
jmp 0x4039d5
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
xor edi, edi
mov ebx, edi
jmp 0x4039d9
cmp dword [0x42edb4], 0
je 0x403aa6
lea eax, [esp + 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 0x403a74
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 + 0x2c]
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.004065c8
mov esi, 0x80040002
test eax, eax
je 0x403a92
push esi
push 0x25
xor ecx, ecx
push ecx
push ecx
push ecx
call eax
test eax, eax
je 0x403a9f
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403aa6
push 9
call fcn.00401533
cmp dword [0x42edcc], 0xffffffff
cmovne ebx, dword [0x42edcc]
push ebx
jmp 0x4039f5