PowerShell Mailbox Collection Script

Detects PowerShell scripts that can be used to collect data from mailboxes. Adversaries may target user email to collect sensitive information.

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 : (
      "Microsoft.Office.Interop.Outlook" or
      "Interop.Outlook.olDefaultFolders" or
      "::olFolderInBox"
   ) or
   powershell.file.script_block_text : (
      "Microsoft.Exchange.WebServices.Data.Folder" or
      "Microsoft.Exchange.WebServices.Data.FileAttachment"
   )
   )

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Collection
- ID: TA0009
- Reference URL: https://attack.mitre.org/tactics/TA0009/
Technique:
- Name: Email Collection
- ID: T1114
- Reference URL: https://attack.mitre.org/techniques/T1114/
Sub-technique:
- Name: Local Email Collection
- ID: T1114.001
- Reference URL: https://attack.mitre.org/techniques/T1114/001/
Sub-technique:
- Name: Remote Email Collection
- ID: T1114.002
- Reference URL: https://attack.mitre.org/techniques/T1114/002/
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/

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