IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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Kerberos Preauthentication Disabled for User

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IMPORTANT: This documentation is no longer updated. Refer to Elastic's version policy and the latest documentation.

Kerberos Preauthentication Disabled for User

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Identifies the modification of account Kerberos preauthentication options. An adversary with GenericWrite/GenericAll rights over the account can maliciously modify these settings to perform offline password cracking attacks such as AS-REP roasting.

Rule type: query

Rule indices:

winlogbeat-*
logs-windows.*
logs-system.*

Severity: medium

Risk score: 47

Runs every: 5 minutes

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
Credential Access

Version: 1

Added (Elastic Stack release): 8.1.0

Rule authors: Elastic

Rule license: Elastic License v2

Investigation guide

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## Config

The 'Audit User Account Management' logging policy must be configured for (Success, Failure).
Steps to implement the logging policy with Advanced Audit Configuration:

```
Computer Configuration >
Policies >
Windows Settings >
Security Settings >
Advanced Audit Policies Configuration >
Audit Policies >
Account Management >
Audit User Account Management (Success,Failure)
```

Rule query

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event.code:4738 and message:"'Don't Require Preauth' - Enabled"

Threat mapping

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Framework: MITRE ATT&CK^TM

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/

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