Unusual File Creation - Alternate Data Streamedit

Identifies suspicious creation of Alternate Data Streams on highly targeted files. This is uncommon for legitimate files and sometimes done by adversaries to hide malware.

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


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

Version: 100

Rule authors:

  • Elastic

Rule license: Elastic License v2

Investigation guideedit

Rule queryedit

file where event.type == "creation" and

  file.path : "C:\\*:*" and
  not file.path : "C:\\*:zone.identifier*" and

  not process.executable :
           "?:\\Program Files (x86)\\Dropbox\\Client\\Dropbox.exe",
           "?:\\Program Files\\Rivet Networks\\SmartByte\\SmartByteNetworkService.exe",
           "?:\\Program Files (x86)\\Microsoft\\Edge\\Application\\msedge.exe",
           "?:\\Program Files\\ExpressConnect\\ExpressConnectNetworkService.exe",
           "?:\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe",
           "?:\\Program Files\\Google\\Chrome\\Application\\chrome.exe",
           "?:\\Program Files\\Mozilla Firefox\\firefox.exe") and

  file.extension :