Persistence via Update Orchestrator Service Hijack

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Persistence via Update Orchestrator Service Hijack

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Identifies potential hijacking of the Microsoft Update Orchestrator Service to establish persistence with an integrity level of SYSTEM.

Rule type: query

Rule indices:

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

Severity: high

Risk score: 73

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
  • Windows
  • Threat Detection
  • Persistence

Version: 3 (version history)

Added (Elastic Stack release): 7.10.0

Last modified (Elastic Stack release): 7.11.2

Rule authors: Elastic

Rule license: Elastic License

Rule query

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event.category:process and event.type:(start or process_started) and
process.parent.name:svchost.exe and process.parent.args:(UsoSvc or
usosvc) and not process.name:(UsoClient.exe or usoclient.exe or
MusNotification.exe or musnotification.exe or MusNotificationUx.exe or
musnotificationux.exe)

Threat mapping

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Framework: MITRE ATT&CKTM

Rule version history

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Version 3 (7.11.2 release)
  • Formatting only
Version 2 (7.11.0 release)
  • Formatting only