New

The executive guide to generative AI

Read more

Remote File Download via PowerShell

edit

Identifies powershell.exe being used to download an executable file from an untrusted 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

edit
sequence by host.id, process.entity_id with maxspan=30s
  [network where process.name : ("powershell.exe", "pwsh.exe", "powershell_ise.exe") and network.protocol == "dns" and
   not dns.question.name : ("localhost", "*.microsoft.com", "*.azureedge.net", "*.powershellgallery.com", "*.windowsupdate.com", "metadata.google.internal") and
   not user.domain : "NT AUTHORITY"]
    [file where process.name : "powershell.exe" and event.type == "creation" and file.extension : ("exe", "dll", "ps1", "bat") and
   not file.name : "__PSScriptPolicy*.ps1"]

Framework: MITRE ATT&CKTM

On this page

Was this helpful?
Feedback