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Remote File Download via Script Interpreter

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Remote File Download via Script Interpreter

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Identifies built-in Windows script interpreters (cscript.exe or wscript.exe) being used to download an executable file from a remote destination.

Rule type: eql

Rule indices:

winlogbeat-*
logs-endpoint.events.*
logs-windows.*

Severity: medium

Risk score: 47

Runs every: 5m

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

Maximum alerts per execution: 100

References: None

Tags:

Elastic
Host
Windows
Threat Detection
Command and Control

Version: 3

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

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sequence by host.id, process.entity_id
  [network where process.name : ("wscript.exe", "cscript.exe") and network.protocol != "dns" and
   network.direction : ("outgoing", "egress") and network.type == "ipv4" and destination.ip != "127.0.0.1"
  ]
  [file where event.type == "creation" and file.extension : ("exe", "dll")]

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Command and Control
- ID: TA0011
- Reference URL: https://attack.mitre.org/tactics/TA0011/
Technique:
- Name: Ingress Tool Transfer
- ID: T1105
- Reference URL: https://attack.mitre.org/techniques/T1105/

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