IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Potential Privilege Escalation via Local Kerberos Relay over LDAP
editPotential Privilege Escalation via Local Kerberos Relay over LDAP
editIdentifies a suspicious local successful logon event where the Logon Package is Kerberos, the remote address is set to localhost, and the target user SID is the built-in local Administrator account. This may indicate an attempt to leverage a Kerberos relay attack variant that can be used to elevate privilege locally from a domain joined limited user to local System 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
References:
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Privilege Escalation
- Credential Access
Version: 1
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule query
editauthentication where /* event 4624 need to be logged */ event.action == "logged-in" and event.outcome == "success" and /* authenticate locally via relayed kerberos ticket */ winlog.event_data.AuthenticationPackageName : "Kerberos" and winlog.logon.type == "Network" and source.ip == "127.0.0.1" and source.port > 0 and /* Impersonate Administrator user via S4U2Self service ticket */ winlog.event_data.TargetUserSid : "S-1-5-21-*-500"
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
-
Technique:
- Name: Abuse Elevation Control Mechanism
- ID: T1548
- Reference URL: https://attack.mitre.org/techniques/T1548/
-
Sub-technique:
- Name: Bypass User Account Control
- ID: T1548.002
- Reference URL: https://attack.mitre.org/techniques/T1548/002/
-
Tactic:
- Name: Credential Access
- ID: TA0006
- Reference URL: https://attack.mitre.org/tactics/TA0006/
-
Technique:
- Name: Steal or Forge Kerberos Tickets
- ID: T1558
- Reference URL: https://attack.mitre.org/techniques/T1558/