IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

« Elastic Agent Service Terminated Enable Host Network Discovery via Netsh »

› › ›

Emond Rules Creation or Modification

edit

Emond Rules Creation or Modification

edit

Identifies the creation or modification of the Event Monitor Daemon (emond) rules. Adversaries may abuse this service by writing a rule to execute commands when a defined event occurs, such as system start up or user authentication.

Rule type: eql

Rule indices:

auditbeat-*
logs-endpoint.events.*

Severity: medium

Risk score: 47

Runs every: 5 minutes

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

Elastic
Host
macOS
Threat Detection
Persistence

Version: 100 (version history)

Added (Elastic Stack release): 7.12.0

Last modified (Elastic Stack release): 8.5.0

Rule authors: Elastic

Rule license: Elastic License v2

Investigation guide

edit

Rule query

edit

file where event.type != "deletion" and file.path :
("/private/etc/emond.d/rules/*.plist", "/etc/emon.d/rules/*.plist",
"/private/var/db/emondClients/*")

Threat mapping

edit

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Persistence
- ID: TA0003
- Reference URL: https://attack.mitre.org/tactics/TA0003/
Technique:
- Name: Event Triggered Execution
- ID: T1546
- Reference URL: https://attack.mitre.org/techniques/T1546/

Rule version history

edit

Version 100 (8.5.0 release)

Formatting only

Version 5 (8.4.0 release)

Formatting only

Version 3 (8.3.0 release)

Updated query, changed from:

file where event.type != "deletion" and file.path :
("/private/etc/emond.d/rules/*.plist", "/etc/emon.d/rules/*.plist")

Version 2 (8.2.0 release)

Formatting only

« Elastic Agent Service Terminated Enable Host Network Discovery via Netsh »