IPSEC NAT Traversal Port Activity

Elastic Stack Serverless Security

This rule detects events that could be describing IPSEC NAT Traversal traffic. IPSEC is a VPN technology that allows one system to talk to another using encrypted tunnels. NAT Traversal enables these tunnels to communicate over the Internet where one of the sides is behind a NAT router gateway. This may be common on your network, but this technique is also used by threat actors to avoid detection.

Rule type: query

Rule indices:

auditbeat-*
filebeat-*
packetbeat-*
logs-endpoint.events.*

Severity: low

Risk score: 21

Runs every: 5m

Searches indices from: now-9m (https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math[Date Math format], see also Additional look-back time)

Maximum alerts per execution: 100

References: None

Tags:

Elastic
Host
Network
Threat Detection
Command and Control
Host

Version: 101

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

		event.category:(network or network_traffic) and network.transport:udp and destination.port:4500

	

Framework: MITRE ATT&CKTM

Tactic:
- Name: Command and Control
- ID: TA0011
- Reference URL: https://attack.mitre.org/tactics/TA0011/