Function at 0x4034a5
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, 0x2d4
push ebx
push esi
push edi
push 0x20
pop edi
xor ebx, ebx
push 0x8001
mov dword [esp + 0x14], ebx
mov dword [esp + 0x10], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0x1c], ebx
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
call dword [sym.imp.KERNEL32.dll_GetVersion]
and eax, 0xbfffffff
cmp ax, 6
mov dword [0x42a24c], eax
je 0x4034f5
push ebx
call fcn.004067c2
cmp eax, ebx
je 0x4034f5
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.00406752
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], 0
jne 0x4034fa
push 0xa
call fcn.004067c2
push 8
call fcn.004067c2
push 6
mov dword [0x42a244], eax
call fcn.004067c2
cmp eax, ebx
je 0x40353d
push 0x1e
call eax
test eax, eax
je 0x40353d
or byte [0x42a24f], 0x40
push ebp
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x42a318], eax
push ebx
lea eax, [esp + 0x34]
push 0x2b4
push eax
push ebx
push 0x4216e8
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x429240
call fcn.004063e8
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
mov ebp, 0x435000
push eax
push ebp
call fcn.004063e8
cmp word [0x435000], 0x22
mov dword [0x42a240], 0x400000
mov eax, ebp
jne 0x4035a6
push 0x22
mov eax, 0x435002
pop edi
push edi
push eax
call fcn.00405cea
push eax
call dword [sym.imp.USER32.dll_CharNextW]
mov ecx, eax
mov dword [esp + 0x18], ecx
mov ax, word [ecx]
cmp ax, bx
je 0x4036d7
push 0x20
pop ebx
cmp ax, bx
jne 0x4035d5
inc ecx
inc ecx
cmp word [ecx], bx
je 0x4035ce
cmp word [ecx], 0x22
jne 0x4035e0
inc ecx
push 0x22
inc ecx
pop ebx
cmp word [ecx], 0x2f
jne 0x4036a3
inc ecx
inc ecx
cmp word [ecx], 0x53
jne 0x40360b
mov ax, word [ecx + 2]
cmp ax, 0x20
je 0x403601
test ax, ax
jne 0x40360b
mov dword [0x42a300], 1
movzx eax, word [0x40a37e]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x40a37c]
cdq
movzx edx, word [str.NCRC]
or edi, eax
movzx eax, word [0x40a37a]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx]
or edi, edx
cmp eax, esi
jne 0x403661
mov eax, dword [ecx + 4]
cmp eax, edi
jne 0x403661
mov ax, word [ecx + 8]
cmp ax, 0x20
je 0x40365c
test ax, ax
jne 0x403661
or dword [esp + 0x1c], 4
movzx eax, word [0x40a372]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov edi, eax
xor esi, esi
movzx eax, word [0x40a370]
cdq
movzx edx, word [0x40a36c]
or edi, eax
movzx eax, word [0x40a36e]
shl eax, 0x10
or eax, edx
cdq
or esi, eax
mov eax, dword [ecx - 4]
or edi, edx
cmp eax, esi
jne 0x4036a3
mov eax, dword [ecx]
cmp eax, edi
je 0x4036c2
push ebx
push ecx
call fcn.00405cea
mov ecx, eax
cmp word [ecx], 0x22
jne 0x4036b4
inc ecx
inc ecx
mov ax, word [ecx]
test ax, ax
jne 0x4035c6
jmp 0x4036d5
and word [ecx - 4], 0
add ecx, 4
push ecx
push 0x435800
call fcn.004063e8
xor ebx, ebx
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
mov edi, 0x437800
push edi
push 0x400
call esi
call fcn.00403474
test eax, eax
jne 0x403749
push 0x3fb
push edi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push edi
call sub.KERNEL32.dll_lstrcatW
call fcn.00403474
test eax, eax
jne 0x403749
push edi
push 0x3fc
call esi
push 0x40a358
push edi
call sub.KERNEL32.dll_lstrcatW
mov esi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
push edi
push str.TEMP
call esi
push edi
push 0x40a344
call esi
call fcn.00403474
test eax, eax
je 0x403814
push 0x437000
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push dword [esp + 0x1c]
call fcn.00402f30
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x403814
cmp dword [0x42a260], ebx
je 0x403804
push ebx
push ebp
call fcn.00405cea
mov esi, eax
cmp esi, ebp
jb 0x4037ce
movzx eax, word [0x40a33e]
cdq
shld edx, eax, 0x10
shl eax, 0x10
mov ebx, eax
movzx eax, word [0x40a33c]
movzx ecx, word [0x40a338]
cdq
or ebx, eax
movzx eax, word [0x40a33a]
shl eax, 0x10
or eax, ecx
xor ecx, ecx
cdq
or ecx, eax
mov eax, ebx
or eax, edx
mov edx, dword [esi]
cmp edx, ecx
jne 0x4037c6
mov edx, dword [esi + 4]
cmp edx, eax
je 0x4037cc
dec esi
dec esi
cmp esi, ebp
jae 0x4037b9
xor ebx, ebx
cmp esi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x403840
mov word [esi], bx
add esi, 8
push esi
call fcn.00405dc5
test eax, eax
je 0x403814
push esi
push 0x435800
call fcn.004063e8
push esi
push 0x436000
call fcn.004063e8
mov dword [esp + 0x10], ebx
or dword [0x42a30c], 0xffffffff
call fcn.00403ad8
mov dword [esp + 0x14], eax
call fcn.004039e6
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x40394a
push 0x200010
push dword [esp + 0x10]
call fcn.00405a4e
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.004059b9
push 0x40a32c
push edi
mov esi, eax
call sub.KERNEL32.dll_lstrcatW
cmp esi, ebx
je 0x403861
push 0x40a328
push edi
call sub.KERNEL32.dll_lstrcatW
push str..tmp
push edi
call sub.KERNEL32.dll_lstrcatW
mov ebp, 0x436800
push ebp
push edi
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
test eax, eax
je 0x403814
cmp esi, ebx
push edi
je 0x403889
call fcn.0040591f
jmp 0x40388e
call fcn.0040599c
push edi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
cmp word [0x435800], bx
jne 0x4038a9
push ebp
push 0x435800
call fcn.004063e8
push dword [esp + 0x18]
push section..ndata
call fcn.004063e8
movzx eax, word [0x40a316]
movzx ecx, word [0x40a314]
shl eax, 0x10
or eax, ecx
push 0x1a
mov dword [0x42b800], eax
pop ebp
mov esi, 0x420ee8
mov eax, dword [0x42a254]
push dword [eax + 0x120]
push esi
call fcn.0040640a
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
cmp dword [esp + 0x10], ebx
je 0x403934
push 1
push esi
push 0x438800
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x403934
push ebx
push esi
call fcn.004061ae
mov eax, dword [0x42a254]
push dword [eax + 0x124]
push esi
call fcn.0040640a
push esi
call fcn.004059d1
cmp eax, ebx
je 0x403934
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc word [0x42b800]
dec ebp
jne 0x4038d7
push ebx
push edi
call fcn.004061ae
jmp 0x403814
cmp dword [0x42a2f4], ebx
je 0x4039ce
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 0x40399e
lea eax, [esp + 0x20]
push eax
push str.SeShutdownPrivilege
push ebx
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
push ebx
push ebx
lea eax, [esp + 0x24]
push ebx
push eax
push ebx
push dword [esp + 0x28]
mov dword [esp + 0x34], 1
mov dword [esp + 0x40], 2
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.004067c2
cmp eax, ebx
mov esi, 0x80040002
je 0x4039ba
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x4039c7
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x4039ce
push 9
call fcn.0040140b
mov eax, dword [0x42a30c]
cmp eax, 0xffffffff
je 0x4039dc
mov dword [esp + 0x10], eax
push dword [esp + 0x10]
call dword [sym.imp.KERNEL32.dll_ExitProcess]