Command Prompt Network Connection

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Command Prompt Network Connection

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

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

Rule version: 1

Added (Elastic Stack release): 7.6.0

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 and not
destination.ip:172.16.0.0/12 and not destination.ip:192.168.0.0/16

Threat mapping

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Framework: MITRE ATT&CK^TM

Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
Technique:
- Name: Command-Line Interface
- ID: T1059
- Reference URL: https://attack.mitre.org/techniques/T1059/
Tactic:
- Name: Command and Control
- ID: TA0011
- Reference URL: https://attack.mitre.org/tactics/TA0011/
Technique:
- Name: Remote File Copy
- ID: T1105
- Reference URL: https://attack.mitre.org/techniques/T1105/

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