InstallUtil Process Making Network Connections

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InstallUtil Process Making Network Connections

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Identifies InstallUtil.exe making outbound network connections. This may indicate adversarial activity as InstallUtil is often leveraged by adversaries to execute code and evade detection.

Rule type: eql

Rule indices:

  • logs-endpoint.events.*
  • winlogbeat-*
  • logs-windows.*

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: None

Tags:

  • Elastic
  • Host
  • Windows
  • Threat Detection
  • Defense Evasion

Version: 100

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule query

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/* the benefit of doing this as an eql sequence vs kql is this will limit to alerting only on the first network connection */

sequence by process.entity_id
  [process where event.type in ("start", "process_started") and process.name : "installutil.exe"]
  [network where process.name : "installutil.exe" and network.direction : ("outgoing", "egress")]

Framework: MITRE ATT&CKTM