Function at 0x404648
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 [0x42aa40], eax
cmp ax, 6
je 0x404693
mov dword [esp], 0
call fcn.00409056
push ebx
test eax, eax
je 0x404693
mov dword [esp], 0xc00
call eax
push ecx
mov ebx, str.UXTHEME
mov dword [esp], ebx
call fcn.00408fc6
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 0x404698
mov dword [esp], 0xb
call fcn.00409056
push ebx
mov dword [esp], 9
call fcn.00409056
push esi
mov dword [0x42aa44], eax
mov dword [esp], 7
call fcn.00409056
push edi
test eax, eax
je 0x4046fc
mov dword [esp], 0x1e
call eax
push ecx
test eax, eax
je 0x4046fc
or dword [0x42aa40], 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], 0x40c4da
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
sub esp, 0x14
mov dword [esp + 4], str.NSIS_Error
mov dword [esp], 0x42aa60
call fcn.004084f3
push eax
push eax
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
mov ecx, dword [0x40c974]
add ecx, 0xa000
mov dword [esp + 4], eax
mov dword [esp], ecx
mov dword [ebp - 0x2dc], ecx
call fcn.004084f3
push eax
push eax
mov dword [esp], 0
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
mov dword [0x42aa48], eax
mov eax, dword [0x40c974]
push edx
movzx eax, word [eax + 0xa000]
cmp ax, 0x22
jne 0x4047b6
mov ecx, dword [0x40c974]
lea edx, [ecx + 0xa002]
jmp 0x4047c1
mov edx, dword [ebp - 0x2dc]
mov eax, 0x20
mov dword [esp], edx
xor edi, edi
mov dword [esp + 4], eax
call fcn.00407d81
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 0x4048a2
movzx edx, word [eax]
cmp dx, 0x20
jne 0x4047f9
add eax, 2
jmp 0x4047eb
cmp dx, 0x22
jne 0x404804
add eax, 2
jmp 0x404809
mov edx, 0x20
cmp word [eax], 0x2f
jne 0x404882
cmp word [eax + 2], 0x53
lea ebx, [eax + 2]
jne 0x40482b
test word [eax + 4], 0xffdf
jne 0x40482b
mov dword [0x414080], 1
cmp dword [eax + 6], 0x430052
jne 0x40484b
cmp dword [eax + 2], 0x43004e
jne 0x40484b
test word [eax + 0xa], 0xffdf
mov ecx, 4
cmove edi, ecx
cmp dword [eax + 2], 0x3d0044
jne 0x404880
cmp dword [eax - 2], 0x2f0020
jne 0x404880
mov word [eax - 2], 0
add eax, 6
mov dword [esp + 4], eax
mov eax, dword [0x40c974]
add eax, 0xa800
mov dword [esp], eax
call fcn.004084f3
push ecx
push ecx
jmp 0x4048a2
mov eax, ebx
mov dword [esp + 4], edx
mov dword [esp], eax
call fcn.00407d81
push edx
push edx
cmp word [eax], 0x22
jne 0x4047e1
add eax, 2
jmp 0x4047e1
mov eax, dword [0x40c974]
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.00404588
test eax, eax
je 0x4048f9
mov eax, dword [0x40c974]
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.004041c2
mov esi, eax
push ecx
test eax, eax
jne 0x404bd4
jmp 0x404983
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.00404588
test eax, eax
jne 0x4048cb
mov dword [esp + 4], ebx
mov dword [esp], 0x3fc
call esi
push esi
push esi
mov dword [esp + 4], 0x40c4fe
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], 0x40c510
call esi
push eax
push eax
call fcn.00404588
test eax, eax
jne 0x4048cb
mov esi, str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
jmp 0x404bd2
cmp dword [0x416924], 0
je 0x404bbf
mov eax, dword [ebp - 0x2dc]
mov dword [esp + 4], 0
mov dword [esp], eax
call fcn.00407d81
push ecx
push ecx
cmp dword [ebp - 0x2dc], eax
ja 0x404a1a
cmp dword [eax + 4], 0x3d003f
je 0x4049be
sub eax, 2
jmp 0x4049a8
cmp dword [eax], 0x5f0020
jne 0x4049b9
lea ebx, [eax + 8]
mov word [eax], 0
mov dword [esp], ebx
call fcn.00408c92
push edx
test eax, eax
jne 0x4049e5
mov esi, str.Error_launching_installer
jmp 0x404bd2
mov eax, dword [0x40c974]
mov dword [esp + 4], ebx
add eax, 0xa800
mov dword [esp], eax
call fcn.004084f3
push eax
push eax
mov eax, dword [0x40c974]
add eax, 0xb000
mov dword [esp + 4], ebx
mov dword [esp], eax
call fcn.004084f3
push eax
push eax
jmp 0x404bbf
call fcn.004090a2
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 0x404a49
mov dword [esp + 4], 0x40c522
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 [0x40c974]
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 0x4049db
mov dword [esp], ebx
test esi, esi
je 0x404a8b
call fcn.00407b80
jmp 0x404a90
call fcn.00407c14
push eax
mov dword [esp], ebx
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
push eax
mov eax, dword [0x40c974]
cmp word [eax + 0xa800], 0
jne 0x404abd
add eax, 0xa800
mov dword [esp + 4], edi
mov dword [esp], eax
call fcn.004084f3
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 [0x40c974]
mov dword [esp], eax
call fcn.004084f3
push eax
push eax
mov eax, dword [0x40c974]
mov dword [eax + 0x800], 0x41
mov eax, dword [0x416930]
mov eax, dword [eax + 0x120]
mov dword [esp], 0x42ba60
mov dword [esp + 4], eax
call fcn.00408698
push ecx
push ecx
mov dword [esp], 0x42ba60
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push eax
test esi, esi
je 0x404b98
mov eax, dword [0x40c974]
mov dword [esp + 8], 1
mov dword [esp + 4], 0x42ba60
add eax, 0xd800
mov dword [esp], eax
call dword [sym.imp.KERNEL32.dll_CopyFileW]
sub esp, 0xc
test eax, eax
je 0x404b98
mov dword [esp + 4], 0
mov dword [esp], 0x42ba60
call fcn.00408c15
push eax
push eax
mov eax, dword [0x416930]
mov eax, dword [eax + 0x124]
mov dword [esp], 0x42ba60
mov dword [esp + 4], eax
call fcn.00408698
push eax
push eax
mov dword [esp], 0x42ba60
call fcn.00407c42
push edx
test eax, eax
je 0x404b98
mov dword [esp], eax
xor esi, esi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
push eax
mov eax, dword [0x40c974]
inc word [eax + 0x800]
dec edi
jne 0x404aef
mov dword [esp + 4], 0
mov dword [esp], ebx
call fcn.00408c15
push edi
push edi
jmp 0x404bd2
mov dword [0x41408c], 0xffffffff
call fcn.0040656c
mov edi, eax
jmp 0x404bd4
xor edi, edi
call fcn.004045e3
call dword [sym.imp.ole32.dll_OleUninitialize]
test esi, esi
mov ebx, dword [sym.imp.KERNEL32.dll_ExitProcess]
je 0x404c07
mov dword [esp], esi
mov dword [esp + 4], 0x200010
call fcn.00407d15
push esi
push esi
mov dword [esp], 2
jmp 0x404d27
cmp dword [0x414074], 0
je 0x404d19
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 0x404cae
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.00409056
push ecx
test eax, eax
jne 0x404cdc
mov dword [esp + 4], 0x80040002
mov dword [esp], 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
push edx
push edx
test eax, eax
je 0x404d0c
jmp 0x404d19
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 0x404cbf
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
nop
nop