Add support for the execution of single powershell commands

Author: OJ

lib/rex/post/meterpreter/extensions/powershell/powershell.rb

@@ -31,12 +31,12 @@ def initialize(client)
   end
 
 
-  def execute_string(string)
+  def execute_string(code)
     request = Packet.create_request('powershell_execute')
+    request.add_tlv(TLV_TYPE_POWERSHELL_CODE, code)
 
     response = client.send_request(request)
-
-    return response
+    return response.get_tlv_value(TLV_TYPE_POWERSHELL_RESULT)
   end
 
 end

lib/rex/post/meterpreter/extensions/powershell/tlv.rb

@@ -6,6 +6,7 @@ module Extensions
 module Powershell
 
 TLV_TYPE_POWERSHELL_CODE             = TLV_META_TYPE_STRING | (TLV_EXTENSIONS + 1)
+TLV_TYPE_POWERSHELL_RESULT           = TLV_META_TYPE_STRING | (TLV_EXTENSIONS + 2)
 
 end
 end

lib/rex/post/meterpreter/ui/console/command_dispatcher/powershell.rb

@@ -62,7 +62,8 @@ def cmd_powershell_execute(*args)
       #end
     }
 
-    client.powershell.execute_string(code)
+    result = client.powershell.execute_string(code)
+    print_good("Command execution completed:\n#{result}")
   end
 
 end