PowerShell Suspicious Script with Clipboard Retrieval Capabilities

Detects PowerShell scripts that can get the contents of the clipboard, which attackers can abuse to retrieve sensitive information like credentials, messages, etc.

Rule type: query

Rule indices:

winlogbeat-*
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
Collection
PowerShell

Version: 1

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

edit

event.category:process and
  (powershell.file.script_block_text : (
    "Windows.Clipboard" or
    "Windows.Forms.Clipboard" or
    "Windows.Forms.TextBox"
   ) and
   powershell.file.script_block_text : (
    "]::GetText" or
    ".Paste()"
  )) or powershell.file.script_block_text : "Get-Clipboard"
  and not user.id : "S-1-5-18"

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Collection
- ID: TA0009
- Reference URL: https://attack.mitre.org/tactics/TA0009/
Technique:
- Name: Clipboard Data
- ID: T1115
- Reference URL: https://attack.mitre.org/techniques/T1115/
Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
Technique:
- Name: Command and Scripting Interpreter
- ID: T1059
- Reference URL: https://attack.mitre.org/techniques/T1059/
Sub-technique:
- Name: PowerShell
- ID: T1059.001
- Reference URL: https://attack.mitre.org/techniques/T1059/001/

« Suspicious Inter-Process Communication via Outlook PowerShell Mailbox Collection Script »