Account Password Reset Remotely

Elastic Stack Serverless Security

Identifies an attempt to reset an account password remotely. Adversaries may manipulate account passwords to maintain access or evade password duration policies and preserve compromised credentials.

Rule type: eql

Rule indices:

• winlogbeat-*
• logs-system.*

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://docs.microsoft.com/en-us/windows/security/threat-protection/auditing/event-4724
• https://stealthbits.com/blog/manipulating-user-passwords-with-mimikatz/
• https://github.com/sbousseaden/EVTX-ATTACK-SAMPLES/blob/master/Credential%20Access/remote_pwd_reset_rpc_mimikatz_postzerologon_target_DC.evtx

Tags:

• Elastic
• Host
• Windows
• Threat Detection
• Persistence

Version: 3

Rule authors:

• Elastic

Rule license: Elastic License v2

sequence by host.id with maxspan=5m
  [authentication where event.action == "logged-in" and
    /* event 4624 need to be logged */
    winlog.logon.type : "Network" and event.outcome == "success" and source.ip != null and
    source.ip != "127.0.0.1" and source.ip != "::1"] by winlog.event_data.TargetLogonId
   /* event 4724 need to be logged */
  [iam where event.action == "reset-password"] by winlog.event_data.SubjectLogonId

Framework: MITRE ATT&CKTM

• Tactic:

  • Name: Persistence
  • ID: TA0003
  • Reference URL: https://attack.mitre.org/tactics/TA0003/

• Technique:

  • Name: Account Manipulation
  • ID: T1098
  • Reference URL: https://attack.mitre.org/techniques/T1098/