Unusual Process Network Connection

Last updated 2 months ago on 2025-03-20
Created 5 years ago on 2020-02-18

About

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.
Tags
Domain: EndpointOS: WindowsUse Case: Threat DetectionTactic: Defense EvasionData Source: Elastic DefendData Source: SysmonLanguage: eql
Severity
low
Risk Score
21
MITRE ATT&CK™

Defense Evasion (TA0005)(opens in a new tab or window)

License
Elastic License v2(opens in a new tab or window)

Definition

Rule Type
Event Correlation Rule
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
winlogbeat-*logs-endpoint.events.process-*logs-endpoint.events.network-*logs-windows.sysmon_operational-*
Related Integrations

endpoint(opens in a new tab or window)

windows(opens in a new tab or window)

Query
sequence by process.entity_id
  [process where host.os.type == "windows" and (process.name : "Microsoft.Workflow.Compiler.exe" or
                  process.name : "bginfo.exe" or
                  process.name : "cdb.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 : "odbcconf.exe" or
                  process.name : "rcsi.exe" or
                  process.name : "xwizard.exe") and
     event.type == "start"]
  [network where host.os.type == "windows" and (process.name : "Microsoft.Workflow.Compiler.exe" or
                  process.name : "bginfo.exe" or
                  process.name : "cdb.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 : "odbcconf.exe" or
                  process.name : "rcsi.exe" or
                  process.name : "xwizard.exe")]

Install detection rules in Elastic Security

Detect Unusual Process Network Connection in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(opens in a new tab or window).