PowerShell Invoke-NinjaCopy script

Elastic Stack Serverless Security

Detects PowerShell scripts that contain the default exported functions used on Invoke-NinjaCopy. Attackers can use Invoke-NinjaCopy to read SYSTEM files that are normally locked, such as the NTDS.dit file or registry hives.

Rule type: query

Rule indices:

winlogbeat-*
logs-windows.*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math[Date Math format], see also Additional look-back time)

Maximum alerts per execution: 100

References:

https://github.com/BC-SECURITY/Empire/blob/main/empire/server/data/module_source/collection/Invoke-NinjaCopy.ps1

Tags:

Elastic
Host
Windows
Threat Detection
Credential Access
PowerShell

Version: 1

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

		event.category:process and
  powershell.file.script_block_text : (
    "StealthReadFile" or
    "StealthReadFileAddr" or
    "StealthCloseFileDelegate" or
    "StealthOpenFile" or
    "StealthCloseFile" or
    "StealthReadFile" or
    "Invoke-NinjaCopy"
   )
  and not user.id : "S-1-5-18"

	

Framework: MITRE ATT&CKTM

Tactic:
- Name: Credential Access
- ID: TA0006
- Reference URL: https://attack.mitre.org/tactics/TA0006/
Technique:
- Name: OS Credential Dumping
- ID: T1003
- Reference URL: https://attack.mitre.org/techniques/T1003/
Sub-technique:
- Name: Security Account Manager
- ID: T1003.002
- Reference URL: https://attack.mitre.org/techniques/T1003/002/
Sub-technique:
- Name: NTDS
- ID: T1003.003
- Reference URL: https://attack.mitre.org/techniques/T1003/003/
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/