Potential Kerberos Attack via Bifrost

Identifies use of Bifrost, a known macOS Kerberos pentesting tool, which can be used to dump cached Kerberos tickets or attempt unauthorized authentication techniques such as pass-the-ticket/hash and kerberoasting.

Rule type: query

Rule indices:

auditbeat-*
logs-endpoint.events.*

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:

https://github.com/its-a-feature/bifrost

Tags:

Elastic
Host
macOS
Threat Detection
Credential Access
Lateral Movement

Version: 100

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

edit

event.category:process and event.type:start and
 process.args:("-action" and ("-kerberoast" or askhash or asktgs or asktgt or s4u or ("-ticket" and ptt) or (dump and (tickets or keytab))))

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Lateral Movement
- ID: TA0008
- Reference URL: https://attack.mitre.org/tactics/TA0008/
Technique:
- Name: Use Alternate Authentication Material
- ID: T1550
- Reference URL: https://attack.mitre.org/techniques/T1550/
Sub-technique:
- Name: Pass the Ticket
- ID: T1550.003
- Reference URL: https://attack.mitre.org/techniques/T1550/003/
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/
Sub-technique:
- Name: Kerberoasting
- ID: T1558.003
- Reference URL: https://attack.mitre.org/techniques/T1558/003/

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