Enumeration of Administrator Accounts

Elastic Stack Serverless Security

Identifies instances of lower privilege accounts enumerating Administrator accounts or groups using built-in Windows tools.

Rule type: eql

Rule indices:

• logs-endpoint.events.*
• winlogbeat-*
• logs-windows.*

Severity: low

Risk score: 21

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: None

Tags:

• Elastic
• Host
• Windows
• Threat Detection
• Discovery

Version: 4

Rule authors:

• Elastic

Rule license: Elastic License v2

process where event.type in ("start", "process_started") and
  (((process.name : "net.exe" or process.pe.original_file_name == "net.exe") or
    ((process.name : "net1.exe" or process.pe.original_file_name == "net1.exe") and
        not process.parent.name : "net.exe")) and
   process.args : ("group", "user", "localgroup") and
   process.args : ("admin", "Domain Admins", "Remote Desktop Users", "Enterprise Admins", "Organization Management") and
   not process.args : "/add")

   or

  ((process.name : "wmic.exe" or process.pe.original_file_name == "wmic.exe") and
     process.args : ("group", "useraccount"))

Framework: MITRE ATT&CKTM

• Tactic:

  • Name: Discovery
  • ID: TA0007
  • Reference URL: https://attack.mitre.org/tactics/TA0007/

• Technique:

  • Name: Permission Groups Discovery
  • ID: T1069
  • Reference URL: https://attack.mitre.org/techniques/T1069/

• Sub-technique:

  • Name: Domain Groups
  • ID: T1069.002
  • Reference URL: https://attack.mitre.org/techniques/T1069/002/

• Technique:

  • Name: Account Discovery
  • ID: T1087
  • Reference URL: https://attack.mitre.org/techniques/T1087/