Function at 0x40447a
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:
push ebp
mov ebp, esp
push edi
push esi
push ebx
sub esp, 0x2fc
mov dword [esp], 0x8001
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
push esi
call dword [sym.imp.KERNEL32.dll_GetVersion]
and eax, 0xbfffffff
mov dword [0x434580], eax
cmp ax, 6
je 0x4044c5
mov dword [esp], 0
call fcn.00408e86
push ebx
test eax, eax
je 0x4044c5
mov dword [esp], 0xc00
call eax
push ecx
mov ebx, str.UXTHEME
mov dword [esp], ebx
call fcn.00408df6
push eax
mov dword [esp], ebx
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea ebx, [ebx + eax + 1]
push edx
cmp byte [ebx], 0
jne 0x4044ca
mov dword [esp], 0xb
call fcn.00408e86
push ebx
mov dword [esp], 9
call fcn.00408e86
push esi
mov dword [0x434584], eax
mov dword [esp], 7
call fcn.00408e86
push edi
test eax, eax
je 0x40452e
mov dword [esp], 0x1e
call eax
push ecx
test eax, eax
je 0x40452e
or dword [0x434580], 0x40000000
call dword [sym.imp.COMCTL32.DLL_InitCommonControls]
mov dword [esp], 0
call dword [sym.imp.ole32.dll_OleInitialize]
push edi
mov dword [section..bss], eax
lea eax, [ebp - 0x2cc]
mov dword [esp + 0x10], 0
mov dword [esp + 0xc], 0x2b4
mov dword [esp + 8], eax
mov dword [esp + 4], 0
mov dword [esp], 0x40c41a
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
sub esp, 0x14
mov dword [esp + 4], str.NSIS_Error
mov dword [esp], 0x4345a0
call fcn.00408323
push eax
push eax
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
mov ecx, dword [0x40c8b4]
add ecx, 0xa000
mov dword [esp + 4], eax
mov dword [esp], ecx
mov dword [ebp - 0x2dc], ecx
call fcn.00408323
push eax
push eax
mov dword [esp], 0
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
mov dword [0x434588], eax
mov eax, dword [0x40c8b4]
push edx
movzx eax, word [eax + 0xa000]
cmp ax, 0x22
jne 0x4045e8
mov ecx, dword [0x40c8b4]
lea edx, [ecx + 0xa002]
jmp 0x4045f3
mov edx, dword [ebp - 0x2dc]
mov eax, 0x20
mov dword [esp], edx
xor edi, edi
mov dword [esp + 4], eax
call fcn.00407bb1
push ebx
push ebx
mov dword [esp], eax
call dword [sym.imp.USER32.dll_CharNextW]
mov dword [ebp - 0x2e0], eax
push esi
cmp word [eax], 0
je 0x4046d4
movzx edx, word [eax]
cmp dx, 0x20
jne 0x40462b
add eax, 2
jmp 0x40461d
cmp dx, 0x22
jne 0x404636
add eax, 2
jmp 0x40463b
mov edx, 0x20
cmp word [eax], 0x2f
jne 0x4046b4
cmp word [eax + 2], 0x53
lea ebx, [eax + 2]
jne 0x40465d
test word [eax + 4], 0xffdf
jne 0x40465d
mov dword [0x414080], 1
cmp dword [eax + 6], 0x430052
jne 0x40467d
cmp dword [eax + 2], 0x43004e
jne 0x40467d
test word [eax + 0xa], 0xffdf
mov ecx, 4
cmove edi, ecx
cmp dword [eax + 2], 0x3d0044
jne 0x4046b2
cmp dword [eax - 2], 0x2f0020
jne 0x4046b2
mov word [eax - 2], 0
add eax, 6
mov dword [esp + 4], eax
mov eax, dword [0x40c8b4]
add eax, 0xa800
mov dword [esp], eax
call fcn.00408323
push ecx
push ecx
jmp 0x4046d4
mov eax, ebx
mov dword [esp + 4], edx
mov dword [esp], eax
call fcn.00407bb1
push edx
push edx
cmp word [eax], 0x22
jne 0x404613
add eax, 2
jmp 0x404613
mov eax, dword [0x40c8b4]
mov dword [esp], 0x400
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
lea ebx, [eax + 0xc800]
mov dword [esp + 4], ebx
call esi
push eax
push eax
call fcn.004043d8
test eax, eax
je 0x40472b
mov eax, dword [0x40c8b4]
add eax, 0xc000
mov dword [esp], eax
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push edx
mov dword [esp], edi
xor edi, edi
call fcn.004040b5
mov esi, eax
push ecx
test eax, eax
jne 0x404a06
jmp 0x4047b5
mov dword [esp + 4], 0x3fb
mov dword [esp], ebx
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push eax
push eax
mov dword [esp + 4], str.Temp
mov dword [esp], ebx
call sub.KERNEL32.dll_lstrcatW
push eax
push eax
call fcn.004043d8
test eax, eax
jne 0x4046fd
mov dword [esp + 4], ebx
mov dword [esp], 0x3fc
call esi
push esi
push esi
mov dword [esp + 4], 0x40c43e
mov dword [esp], ebx
call sub.KERNEL32.dll_lstrcatW
mov esi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
push eax
push eax
mov dword [esp + 4], ebx
mov dword [esp], str.TEMP
call esi
push eax
push eax
mov dword [esp + 4], ebx
mov dword [esp], 0x40c450
call esi
push eax
push eax
call fcn.004043d8
test eax, eax
jne 0x4046fd
mov esi, str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
jmp 0x404a04
cmp dword [0x416924], 0
je 0x4049f1
mov eax, dword [ebp - 0x2dc]
mov dword [esp + 4], 0
mov dword [esp], eax
call fcn.00407bb1
push ecx
push ecx
cmp dword [ebp - 0x2dc], eax
ja 0x40484c
cmp dword [eax + 4], 0x3d003f
je 0x4047f0
sub eax, 2
jmp 0x4047da
cmp dword [eax], 0x5f0020
jne 0x4047eb
lea ebx, [eax + 8]
mov word [eax], 0
mov dword [esp], ebx
call fcn.00408ac2
push edx
test eax, eax
jne 0x404817
mov esi, str.Error_launching_installer
jmp 0x404a04
mov eax, dword [0x40c8b4]
mov dword [esp + 4], ebx
add eax, 0xa800
mov dword [esp], eax
call fcn.00408323
push eax
push eax
mov eax, dword [0x40c8b4]
add eax, 0xb000
mov dword [esp + 4], ebx
mov dword [esp], eax
call fcn.00408323
push eax
push eax
jmp 0x4049f1
call fcn.00408ed2
mov dword [esp + 4], str.nsu
mov dword [esp], ebx
mov esi, eax
call sub.KERNEL32.dll_lstrcatW
push eax
push eax
test esi, esi
je 0x40487b
mov dword [esp + 4], 0x40c462
mov dword [esp], ebx
call sub.KERNEL32.dll_lstrcatW
push edi
push edi
mov dword [esp + 4], str..tmp
mov dword [esp], ebx
call sub.KERNEL32.dll_lstrcatW
mov eax, dword [0x40c8b4]
push edx
push edx
lea edi, [eax + 0xb800]
mov dword [esp + 4], edi
mov dword [esp], ebx
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
push ecx
push ecx
test eax, eax
je 0x40480d
mov dword [esp], ebx
test esi, esi
je 0x4048bd
call fcn.004079b0
jmp 0x4048c2
call fcn.00407a44
push eax
mov dword [esp], ebx
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
push eax
mov eax, dword [0x40c8b4]
cmp word [eax + 0xa800], 0
jne 0x4048ef
add eax, 0xa800
mov dword [esp + 4], edi
mov dword [esp], eax
call fcn.00408323
push eax
push eax
mov eax, dword [ebp - 0x2e0]
mov edi, 0x1a
mov esi, str.Error_launching_installer
mov dword [esp + 4], eax
mov eax, dword [0x40c8b4]
mov dword [esp], eax
call fcn.00408323
push eax
push eax
mov eax, dword [0x40c8b4]
mov dword [eax + 0x800], 0x41
mov eax, dword [0x416930]
mov eax, dword [eax + 0x120]
mov dword [esp], 0x4355a0
mov dword [esp + 4], eax
call fcn.004084c8
push ecx
push ecx
mov dword [esp], 0x4355a0
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push eax
test esi, esi
je 0x4049ca
mov eax, dword [0x40c8b4]
mov dword [esp + 8], 1
mov dword [esp + 4], 0x4355a0
add eax, 0xd800
mov dword [esp], eax
call dword [sym.imp.KERNEL32.dll_CopyFileW]
sub esp, 0xc
test eax, eax
je 0x4049ca
mov dword [esp + 4], 0
mov dword [esp], 0x4355a0
call fcn.00408a45
push eax
push eax
mov eax, dword [0x416930]
mov eax, dword [eax + 0x124]
mov dword [esp], 0x4355a0
mov dword [esp + 4], eax
call fcn.004084c8
push eax
push eax
mov dword [esp], 0x4355a0
call fcn.00407a72
push edx
test eax, eax
je 0x4049ca
mov dword [esp], eax
xor esi, esi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
push eax
mov eax, dword [0x40c8b4]
inc word [eax + 0x800]
dec edi
jne 0x404921
mov dword [esp + 4], 0
mov dword [esp], ebx
call fcn.00408a45
push edi
push edi
jmp 0x404a04
mov dword [0x41408c], 0xffffffff
call fcn.0040639c
mov edi, eax
jmp 0x404a06
xor edi, edi
call fcn.00404433
call dword [sym.imp.ole32.dll_OleUninitialize]
test esi, esi
mov ebx, dword [sym.imp.KERNEL32.dll_ExitProcess]
je 0x404a39
mov dword [esp], esi
mov dword [esp + 4], 0x200010
call fcn.00407b45
push esi
push esi
mov dword [esp], 2
jmp 0x404b59
cmp dword [0x414074], 0
je 0x404b4b
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
lea edx, [ebp - 0x2d0]
mov dword [esp + 4], 0x28
mov dword [esp + 8], edx
mov dword [esp], eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
sub esp, 0xc
test eax, eax
je 0x404ae0
lea eax, [ebp - 0x2c8]
mov dword [esp + 4], str.SeShutdownPrivilege
lea esi, [ebp - 0x2cc]
mov dword [esp + 8], eax
mov dword [esp], 0
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
mov eax, dword [ebp - 0x2d0]
mov dword [ebp - 0x2cc], 1
mov dword [ebp - 0x2c0], 2
sub esp, 0xc
mov dword [esp + 0x14], 0
mov dword [esp + 0x10], 0
mov dword [esp + 0xc], 0
mov dword [esp + 8], esi
mov dword [esp + 4], 0
mov dword [esp], eax
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
sub esp, 0x18
mov dword [esp], 4
call fcn.00408e86
push ecx
test eax, eax
jne 0x404b0e
mov dword [esp + 4], 0x80040002
mov dword [esp], 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
push edx
push edx
test eax, eax
je 0x404b3e
jmp 0x404b4b
mov dword [esp + 0x10], 0x80040002
mov dword [esp + 0xc], 0x25
mov dword [esp + 8], 0
mov dword [esp + 4], 0
mov dword [esp], 0
call eax
sub esp, 0x14
test eax, eax
jne 0x404af1
mov dword [esp], 9
call fcn.00403c21
push eax
mov eax, dword [0x41408c]
cmp eax, 0xffffffff
cmovne edi, eax
mov dword [esp], edi
call ebx
nop