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Elastic Docs ›Elastic Security Solution [7.11] ›Detections and Alerts ›Prebuilt rule reference
« Unusual Login Activity Unusual Network Connection via RunDLL32 »

Unusual Network Activity from a Windows System Binaryedit

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: eql

Rule indices:

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

Severity: medium

Risk score: 21

Runs every: 5 minutes

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

Tags:

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

Version: 1

Added (Elastic Stack release): 7.10.0

Rule authors: Elastic

Rule license: Elastic License

Rule queryedit

sequence by process.entity_id with maxspan=5m [process where
event.type in ("start", "process_started") and /* known
applocker bypasses */ (process.name : "bginfo.exe" or
process.name : "cdb.exe" or process.name : "control.exe" or
process.name : "cmstp.exe" or process.name : "csi.exe" or
process.name : "dnx.exe" or process.name : "fsi.exe" or
process.name : "ieexec.exe" or process.name : "iexpress.exe" or
process.name : "installutil.exe" or process.name :
"Microsoft.Workflow.Compiler.exe" or process.name :
"MSBuild.exe" or process.name : "msdt.exe" or process.name
: "mshta.exe" or process.name : "msiexec.exe" or
process.name : "msxsl.exe" or process.name : "odbcconf.exe" or
process.name : "rcsi.exe" or process.name : "regsvr32.exe" or
process.name : "xwizard.exe")] [network where (process.name :
"bginfo.exe" or process.name : "cdb.exe" or process.name :
"control.exe" or process.name : "cmstp.exe" or
process.name : "csi.exe" or process.name : "dnx.exe" or
process.name : "fsi.exe" or process.name : "ieexec.exe" or
process.name : "iexpress.exe" or process.name :
"installutil.exe" or process.name :
"Microsoft.Workflow.Compiler.exe" or process.name :
"MSBuild.exe" or process.name : "msdt.exe" or process.name
: "mshta.exe" or process.name : "msiexec.exe" or
process.name : "msxsl.exe" or process.name : "odbcconf.exe" or
process.name : "rcsi.exe" or process.name : "regsvr32.exe" or
process.name : "xwizard.exe")]

Threat mappingedit

Framework: MITRE ATT&CKTM

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