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In past we saw method of direct shell code execution in Ms word or Excel using macro;but if document is closed then we will lose our shell so we have to migrate to other process and sometimes migration is pick up by AV. So in this tutorial we are going to use powershell payload.

(1)Persistence
(2)Migration is not needed
(3)AV bypass

(1)First we will generate powershell payload; for this purpose i used SET.You can also used Veil or powersploit.Open SET in terminal & select Social-Engineering Attacks and then Powershell Attack Vectors.Generate Powershell Alphanumeric Shellcode Injector.Fill LHOST & LPORT value.

Our generated powershell payload is located into /root/.set/reports/powershell/. Rename x86_powershell_injection.txt to x32.ps1.

root@bt:~# cd Powershell-payload-Excel-Delivery/

(3)In Powershell-payload-Excel-Delivery folder; rename RemovePayload.bat to remove.bat. Now you have to host remove.bat and x32.ps1 to web-server.Then open persist.vbs file and change URL of x32.ps1 in line 13,33 to your hosted x32.ps1 `s URL. And now also host persist.vbs to web-server. I used localhost.

(4)Open Macrocode file from cloned folder & change URL in line 27,82,118 respectively to your hosted x32.ps1,persist.vbs and remove.bat `s URL.Now add this macro code into excel document as mentioned in previous tutorial.

(5)And last step is setup listener.

Now send this document to victim , as soon as he open document and run macro we will get shell. Once the payload is ran, it runs in the powershell process, so if the user closes excel, you keep your shell. You also remain in a stable process until reboot, so migration is not needed.

It then pulls down a persistence script, drops it, creates a registry key for autorun for the persistence script. Once done, it also drops a self-deleting bat file that removes the initial payload from the system.

Thanks to  enigma0x3 for this awesome method.

Update :- New-Powershell-Payload-Excel-Delivery

This is a VBA macro that uses Matt Graebers Invoke-Shellcode to execute a powershell payload in memory as well as schedule a task for persistence(20 min onidle  you get shell).
root@bt:~# git clone https://github.com/enigma0x3/Powershell-Payload-Excel-Delivery.git
root@bt:~# cd Powershell-Payload-Excel-Delivery/

Open MacroCode file & change Download URL for Invoke-Shellcode file & change LHOST & LPORT option. Now add macro-code in Excel file & start-up listener.