Apple Script Execution followed by Network Connection

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Apple Script Execution followed by Network Connection

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Detects execution via the Apple script interpreter (osascript) followed by a network connection from the same process within a short time period. Adversaries may use malicious scripts for execution and command and control.

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
  • Command and Control
  • Execution

Version: 1

Added (Elastic Stack release): 7.11.0

Rule authors: Elastic

Rule license: Elastic License

Rule query

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sequence by host.id, process.entity_id with maxspan=30s [process
where event.type == "start" and process.name == "osascript"] [network
where event.type != "end" and process.name == "osascript" and
destination.ip != "::1" and not cidrmatch(destination.ip,
"10.0.0.0/8", "172.16.0.0/12",
"192.168.0.0/16", "127.0.0.0/8",
"169.254.0.0/16", "224.0.0.0/4",
"FE80::/10", "FF00::/8") ]

Threat mapping

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Framework: MITRE ATT&CKTM