LoFP / some networks may utilize pptp protocols but this is uncommon as more modern vpn technologies are available. usage that is unfamiliar to local network administrators can be unexpected and suspicious. torrenting applications may use this port. because this port is in the ephemeral range, this rule may false under certain conditions, such as when an application server replies to a client that used this port by coincidence. this is uncommon but such servers can be excluded.

Techniques

Sample rules

PPTP (Point to Point Tunneling Protocol) Activity

• source: elastic
• technicques:

Description

This rule detects events that may indicate use of a PPTP VPN connection. Some threat actors use these types of connections to tunnel their traffic while avoiding detection.

Detection logic

event.category:(network or network_traffic) and network.transport:tcp and destination.port:1723