Potential Protocol Tunneling via EarthWorm

Elastic Stack Serverless Security

Identifies the execution of the EarthWorm tunneler. Adversaries may tunnel network communications to and from a victim system within a separate protocol to avoid detection and network filtering, or to enable access to otherwise unreachable systems.

Rule type: eql

Rule indices:

• auditbeat-*
• logs-endpoint.events.*

Severity: medium

Risk score: 47

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:

• http://rootkiter.com/EarthWorm/
• https://decoded.avast.io/luigicamastra/apt-group-targeting-governmental-agencies-in-east-asia/

Tags:

• Elastic
• Host
• Linux
• Threat Detection
• Command and Control

Version: 101

Rule authors:

• Elastic

Rule license: Elastic License v2

process where event.type == "start" and
 process.args : "-s" and process.args : "-d" and process.args : "rssocks"

Framework: MITRE ATT&CKTM

• Tactic:

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

• Technique:

  • Name: Protocol Tunneling
  • ID: T1572
  • Reference URL: https://attack.mitre.org/techniques/T1572/