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IMPORTANT: No additional bug fixes or documentation updates will be released for this version.
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Elastic Docs ›SIEM Guide [7.8] ›Detections (beta) ›Prebuilt rule reference

Command Prompt Network Connection

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Command Prompt Network Connection

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Identifies cmd.exe making a network connection. Adversaries can abuse cmd.exe to download or execute malware from a remote URL.

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

Potential false positives

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Administrators may use the command prompt for regular administrative tasks. It’s important to baseline your environment for network connections being made from the command prompt to determine any abnormal use of this tool.

Rule query

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process.name:cmd.exe and event.action:"Network connection detected
(rule: NetworkConnect)" and not destination.ip:(10.0.0.0/8 or
172.16.0.0/12 or 192.168.0.0/16)

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: 

process.name:cmd.exe and event.action:"Network connection detected
(rule: NetworkConnect)" and not destination.ip:10.0.0.0/8 and not
destination.ip:172.16.0.0/12 and not destination.ip:192.168.0.0/16
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