No Suitable Encryption Key Found For Generating Kerberos Ticket — Sigma Rule

Rule metadata and linked tags

Author: @SerkinValery. Source status: test; severity: low. Source dates: 2024-03-07 / 2025-09-22.

{
  "product": "windows",
  "service": "system"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 6a9a3ec9843b2eedea598571c11fa2deacf2abd89435543625ca8ab453cdafb3

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: No Suitable Encryption Key Found For Generating Kerberos Ticket
id: b1e0b3f5-b62e-41be-886a-daffde446ad4
status: test
description: |
    Detects errors when a target server doesn't have suitable keys for generating kerberos tickets.
    This issue can occur for example when a service uses a user account or a computer account that is configured for only DES encryption on a computer that is running Windows 7 which has DES encryption for Kerberos authentication disabled.
references:
    - https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-r2-and-2008/dd348773(v=ws.10)
    - https://learn.microsoft.com/en-us/troubleshoot/windows-server/windows-security/kdc-event-16-27-des-encryption-disabled
author: '@SerkinValery'
date: 2024-03-07
modified: 2025-09-22
tags:
    - attack.credential-access
    - attack.t1558.003
logsource:
    product: windows
    service: system
detection:
    selection:
        Provider_Name:
            - 'Kerberos-Key-Distribution-Center'
            - 'Microsoft-Windows-Kerberos-Key-Distribution-Center'
        EventID:
            - 16 # KDCEVENT_NO_KEY_INTERSECTION_TGS
            - 27 # KDCEVENT_UNSUPPORTED_ETYPE_REQUEST_TGS
    condition: selection
falsepositives:
    - Unknown
level: low

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-r2-and-2008/dd348773(v=ws.10)
• https://learn.microsoft.com/en-us/troubleshoot/windows-server/windows-security/kdc-event-16-27-des-encryption-disabled