Persistence via PowerShell profile

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Identifies the creation or modification of a PowerShell profile. PowerShell profile is a script that is executed when PowerShell starts to customize the user environment, which can be abused by attackers to persist in a environment where PowerShell is common.

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:

Tags:

  • Elastic
  • Host
  • Windows
  • Threat Detection
  • Persistence

Version: 2

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule query

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file where event.type != "deletion" and
  file.path : ("?:\\Users\\*\\Documents\\WindowsPowerShell\\*",
               "?:\\Users\\*\\Documents\\PowerShell\\*",
               "?:\\Windows\\System32\\WindowsPowerShell\\*") and
  file.name : ("profile.ps1", "Microsoft.Powershell_profile.ps1")

Framework: MITRE ATT&CKTM