Remote Computer Account DnsHostName Updateedit

Identifies the remote update to a computer account’s DnsHostName attribute. If the new value set is a valid domain controller DNS hostname and the subject computer name is not a domain controller, then it’s highly likely a preparation step to exploit CVE-2022-26923 in an attempt to elevate privileges from a standard domain user to domain admin privileges.

Rule type: eql

Rule indices:

  • winlogbeat-*
  • logs-system.*

Severity: high

Risk score: 73

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100



  • Elastic
  • Host
  • Windows
  • Threat Detection
  • Privilege Escalation
  • Active Directory

Version: 1

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule queryedit

sequence by with maxspan=5m

  [authentication where event.action == "logged-in" and
   winlog.logon.type == "Network" and event.outcome == "success" and
   not == "ANONYMOUS LOGON" and not winlog.event_data.SubjectUserName : "*$" and
   not user.domain == "NT AUTHORITY" and source.ip != "" and source.ip !="::1"] by winlog.event_data.TargetLogonId

  [iam where event.action == "changed-computer-account" and

   /* if DnsHostName value equal a DC DNS hostname then it's highly suspicious */
    winlog.event_data.DnsHostName : "??*"] by winlog.event_data.SubjectLogonId