How can the Waitfor.exe backdoor be made reusable and persistent?

To make the backdoor reusable, the command executed after receiving the signal must include a call to restart the waitfor waiting mode. For example, a PowerShell script can run the payload and then immediately execute `cmd /c waitfor persist & powershell -executionpolicy bypass -file script.ps1`, creating a continuous loop. Another approach uses a WMI class to store both the payload and the re‑arm logic, as shown in the Use Waitfor.exe to maintain persistence article, ensuring the backdoor remains active after each activation.