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Elastic Docs ›SIEM Guide [7.8] ›Detections (beta) ›Prebuilt rule reference

Unusual Process Network Connection

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IMPORTANT: This documentation is no longer updated. Refer to Elastic's version policy and the latest documentation.

Unusual Process Network Connection

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Identifies network activity from unexpected system applications. This may indicate adversarial activity as these applications are often leveraged by adversaries to execute code and evade detection.

Rule type: query

Rule indices:

  • winlogbeat-*

Severity: low

Risk score: 21

Runs every: 5 minutes

Searches indices from: now-6m (Date Math format, see also Additional look-back time)

Maximum signals per execution: 100

Tags:

  • Elastic
  • Windows

Version: 2 (version history)

Added (Elastic Stack release): 7.6.0

Last modified (Elastic Stack release): 7.7.0

Rule query

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event.action:"Network connection detected (rule: NetworkConnect)" and
process.name:(Microsoft.Workflow.Compiler.exe or bginfo.exe or cdb.exe
or cmstp.exe or csi.exe or dnx.exe or fsi.exe or ieexec.exe or
iexpress.exe or odbcconf.exe or rcsi.exe or xwizard.exe)

Threat mapping

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Framework: MITRE ATT&CKTM

Rule version history

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Version 2 (7.7.0 release)

Updated query, changed from: 

event.action:"Network connection detected (rule: NetworkConnect)" and
process.name:(bginfo.exe or cdb.exe or cmstp.exe or csi.exe or dnx.exe
or fsi.exe or ieexec.exe or iexpress.exe or
Microsoft.Workflow.Compiler.exe or odbcconf.exe or rcsi.exe or
xwizard.exe)
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