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Finder Sync Plugin Registered and Enabled

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Finder Sync plugins enable users to extend Finder’s functionality by modifying the user interface. Adversaries may abuse this feature by adding a rogue Finder Plugin to repeatedly execute malicious payloads for persistence.

Rule type: eql

Rule indices:

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

Severity: medium

Risk score: 47

Runs every: 5m

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: 2

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule query

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sequence by host.id, user.id with maxspan = 5s
  [process where event.type in ("start", "process_started") and process.name : "pluginkit" and process.args : "-a"]
  [process where event.type in ("start", "process_started") and process.name : "pluginkit" and
    process.args : "-e" and process.args : "use" and process.args : "-i" and
    not process.args :
    (
      "com.google.GoogleDrive.FinderSyncAPIExtension",
      "com.google.drivefs.findersync",
      "com.boxcryptor.osx.Rednif",
      "com.adobe.accmac.ACCFinderSync",
      "com.microsoft.OneDrive.FinderSync",
      "com.insynchq.Insync.Insync-Finder-Integration",
      "com.box.desktop.findersyncext"
    )
  ]

Framework: MITRE ATT&CKTM

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