Update win_rdp_reverse_tunnel.yml

With the recent example for the evtx. RDP Tunneling can happen not only from port 3389. So I tune it to fit in general.

Changed the obsolete twitter status with linkage to the evtx from Samir Bousseaden

rules/windows/builtin/win_rdp_reverse_tunnel.yml

@@ -1,8 +1,8 @@
 title: RDP over Reverse SSH Tunnel WFP
 status: experimental
-description: Detects svchost hosting RDP termsvcs communicating with the loopback address and on TCP port 3389
+description: Detects svchost hosting RDP termsvcs communicating with the loopback address
 references:
-    - https://twitter.com/SBousseaden/status/1096148422984384514
+    - https://github.com/sbousseaden/EVTX-ATTACK-SAMPLES/blob/master/Command%20and%20Control/DE_RDP_Tunnel_5156.evtx
 author: Samir Bousseaden
 date: 2019/02/16
 tags:
@@ -17,12 +17,10 @@ detection:
     selection:
         EventID: 5156
     sourceRDP:
-        SourcePort: 3389
         DestinationAddress:
             - '127.*'
             - '::1'
     destinationRDP:
-        DestinationPort: 3389
         SourceAddress:
             - '127.*'
             - '::1'