IMPORTANT: No additional bug fixes or documentation updates will be released for this version.
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.
Rule type: query
Risk score: 21
Runs every: 5 minutes
Searches indices from: now-6m (Date Math format, see also
Additional look-back time)
Maximum signals per execution: 100
Version: 2 (version history)
Added (Elastic Stack release): 7.6.0
Last modified (Elastic Stack release): 7.6.1
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.
network.transport:tcp and destination.port:1723
Framework: MITRE ATT&CKTM
- Name: Command and Control
- ID: TA0011
- Reference URL: https://attack.mitre.org/tactics/TA0011/
- Name: Commonly Used Port
- ID: T1043
- Reference URL: https://attack.mitre.org/techniques/T1043/
- Version 2 (7.6.1 release)
- Removed auditbeat-*, packetbeat-*, and winlogbeat-* from the rule indices.
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