Function at 0x404392
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 [0x43cae0], eax
cmp ax, 6
je 0x4043dd
mov dword [esp], 0
call fcn.00408d43
push ebx
test eax, eax
je 0x4043dd
mov dword [esp], 0xc00
call eax
push ecx
mov ebx, str.UXTHEME
mov dword [esp], ebx
call fcn.00408cb3
push edi
mov dword [esp], ebx
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea ebx, [ebx + eax + 1]
push edx
cmp byte [ebx], 0
jne 0x4043e2
mov dword [esp], 0xa
call fcn.00408d43
push ecx
mov dword [esp], 8
call fcn.00408d43
push ebx
mov dword [0x43cae4], eax
mov dword [esp], 6
call fcn.00408d43
push esi
test eax, eax
je 0x404446
mov dword [esp], 0x1e
call eax
push edx
test eax, eax
je 0x404446
or dword [0x43cae0], 0x40000000
call dword [sym.imp.COMCTL32.DLL_InitCommonControls]
mov dword [esp], 0
call dword [sym.imp.ole32.dll_OleInitialize]
push ecx
mov dword [0x43ca58], 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], 0x40c43a
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
sub esp, 0x14
mov dword [esp + 4], str.NSIS_Error
mov dword [esp], 0x43cb00
call fcn.0040822c
push ebx
push ebx
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
mov ecx, dword [0x40c8d4]
add ecx, 0xa000
mov dword [esp + 4], eax
mov dword [esp], ecx
mov dword [ebp - 0x2dc], ecx
call fcn.0040822c
push esi
push esi
mov dword [esp], 0
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
mov dword [0x43caec], eax
mov eax, dword [0x40c8d4]
push edi
movzx eax, word [eax + 0xa000]
cmp ax, 0x22
jne 0x404500
mov ecx, dword [0x40c8d4]
lea edx, [ecx + 0xa002]
jmp 0x40450b
mov edx, dword [ebp - 0x2dc]
mov eax, 0x20
mov dword [esp], edx
mov dword [esp + 4], eax
call fcn.00407ab9
push edi
push edi
xor edi, edi
mov dword [esp], eax
call dword [sym.imp.USER32.dll_CharNextW]
mov dword [ebp - 0x2e0], eax
push edx
cmp word [eax], 0
je 0x4045ec
movzx edx, word [eax]
cmp dx, 0x20
jne 0x404543
add eax, 2
jmp 0x404535
cmp dx, 0x22
jne 0x40454e
add eax, 2
jmp 0x404553
mov edx, 0x20
cmp word [eax], 0x2f
jne 0x4045cc
cmp word [eax + 2], 0x53
lea ebx, [eax + 2]
jne 0x404575
test word [eax + 4], 0xffdf
jne 0x404575
mov dword [0x43ca40], 1
cmp dword [eax + 6], 0x430052
jne 0x404595
cmp dword [eax + 2], 0x43004e
jne 0x404595
test word [eax + 0xa], 0xffdf
mov ecx, 4
cmove edi, ecx
cmp dword [eax + 2], 0x3d0044
jne 0x4045ca
cmp dword [eax - 2], 0x2f0020
jne 0x4045ca
mov word [eax - 2], 0
add eax, 6
mov dword [esp + 4], eax
mov eax, dword [0x40c8d4]
add eax, 0xa800
mov dword [esp], eax
call fcn.0040822c
push esi
push esi
jmp 0x4045ec
mov eax, ebx
mov dword [esp + 4], edx
mov dword [esp], eax
call fcn.00407ab9
push ebx
push ebx
cmp word [eax], 0x22
jne 0x40452b
add eax, 2
jmp 0x40452b
mov eax, dword [0x40c8d4]
mov dword [esp], 0x400
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
lea ebx, [eax + 0xc800]
mov dword [esp + 4], ebx
call esi
push ecx
push ecx
call fcn.004042f0
test eax, eax
je 0x404643
mov eax, dword [0x40c8d4]
add eax, 0xc000
mov dword [esp], eax
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push eax
mov dword [esp], edi
xor edi, edi
call fcn.00403fcd
mov esi, eax
push edx
test eax, eax
jne 0x40491e
jmp 0x4046cd
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.004042f0
test eax, eax
jne 0x404615
mov dword [esp + 4], ebx
mov dword [esp], 0x3fc
call esi
push esi
push esi
mov dword [esp + 4], 0x40c45e
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], 0x40c470
call esi
push eax
push eax
call fcn.004042f0
test eax, eax
jne 0x404615
mov esi, str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
jmp 0x40491c
cmp dword [0x43cac8], 0
je 0x404909
mov eax, dword [ebp - 0x2dc]
mov dword [esp + 4], 0
mov dword [esp], eax
call fcn.00407ab9
push ecx
push ecx
cmp dword [ebp - 0x2dc], eax
ja 0x404764
cmp dword [eax + 4], 0x3d003f
je 0x404708
sub eax, 2
jmp 0x4046f2
cmp dword [eax], 0x5f0020
jne 0x404703
lea ebx, [eax + 8]
mov word [eax], 0
mov dword [esp], ebx
call fcn.0040897a
push edx
test eax, eax
jne 0x40472f
mov esi, str.Error_launching_installer
jmp 0x40491c
mov eax, dword [0x40c8d4]
mov dword [esp + 4], ebx
add eax, 0xa800
mov dword [esp], eax
call fcn.0040822c
mov eax, dword [0x40c8d4]
push edi
push edi
add eax, 0xb000
mov dword [esp + 4], ebx
mov dword [esp], eax
call fcn.0040822c
push eax
push eax
jmp 0x404909
call fcn.00408d8f
mov dword [esp + 4], str.nsu
mov dword [esp], ebx
mov edi, eax
call sub.KERNEL32.dll_lstrcatW
push esi
push esi
test edi, edi
je 0x404793
mov dword [esp + 4], 0x40c482
mov dword [esp], ebx
call sub.KERNEL32.dll_lstrcatW
push ecx
push ecx
mov dword [esp + 4], str..tmp
mov dword [esp], ebx
call sub.KERNEL32.dll_lstrcatW
push eax
push eax
mov eax, dword [0x40c8d4]
lea esi, [eax + 0xb800]
mov dword [esp + 4], esi
mov dword [esp], ebx
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
push edx
push edx
test eax, eax
je 0x404725
mov dword [esp], ebx
test edi, edi
je 0x4047d5
call fcn.004078b8
jmp 0x4047da
call fcn.0040794c
push eax
mov dword [esp], ebx
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
push eax
mov eax, dword [0x40c8d4]
cmp word [eax + 0xa800], 0
jne 0x404807
add eax, 0xa800
mov dword [esp + 4], esi
mov dword [esp], eax
call fcn.0040822c
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 [0x40c8d4]
mov dword [esp], eax
call fcn.0040822c
push eax
push eax
mov eax, dword [0x40c8d4]
mov dword [eax + 0x800], 0x41
mov eax, dword [0x43ca60]
mov eax, dword [eax + 0x120]
mov dword [esp], 0x434480
mov dword [esp + 4], eax
call fcn.00408385
push ecx
push ecx
mov dword [esp], 0x434480
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push eax
test esi, esi
je 0x4048e2
mov eax, dword [0x40c8d4]
mov dword [esp + 8], 1
mov dword [esp + 4], 0x434480
add eax, 0xd800
mov dword [esp], eax
call dword [sym.imp.KERNEL32.dll_CopyFileW]
sub esp, 0xc
test eax, eax
je 0x4048e2
mov dword [esp + 4], 0
mov dword [esp], 0x434480
call fcn.004088fd
push eax
push eax
mov eax, dword [0x43ca60]
mov eax, dword [eax + 0x124]
mov dword [esp], 0x434480
mov dword [esp + 4], eax
call fcn.00408385
push eax
push eax
mov dword [esp], 0x434480
call fcn.0040797a
push edx
test eax, eax
je 0x4048e2
mov dword [esp], eax
xor esi, esi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
push eax
mov eax, dword [0x40c8d4]
inc word [eax + 0x800]
dec edi
jne 0x404839
mov dword [esp + 4], 0
mov dword [esp], ebx
call fcn.004088fd
push edi
push edi
jmp 0x40491c
mov dword [0x43ca4c], 0xffffffff
call fcn.004062a6
mov edi, eax
jmp 0x40491e
xor edi, edi
call fcn.0040434b
call dword [sym.imp.ole32.dll_OleUninitialize]
test esi, esi
mov ebx, dword [sym.imp.KERNEL32.dll_ExitProcess]
je 0x404951
mov dword [esp], esi
mov dword [esp + 4], 0x200010
call fcn.00407a4d
push esi
push esi
mov dword [esp], 2
jmp 0x404a71
cmp dword [0x43ca34], 0
je 0x404a63
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 0x4049f8
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.00408d43
push ecx
test eax, eax
jne 0x404a26
mov dword [esp + 4], 0x80040002
mov dword [esp], 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
push edx
push edx
test eax, eax
je 0x404a56
jmp 0x404a63
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 0x404a09
mov dword [esp], 9
call fcn.00403b3a
push eax
mov eax, dword [0x43ca4c]
cmp eax, 0xffffffff
cmovne edi, eax
mov dword [esp], edi
call ebx
nop