1200KM / sigma-rule
Suspicious Kerberos Ticket Request via PowerShell Script - ScriptBlock — Sigma Rule
Sigma rule a861d835-af37-4930-bcd6-5b178bfb54df. Suspicious Kerberos Ticket Request via PowerShell Script - ScriptBlock — Sigma Rule. Detects PowerShell scripts that utilize native PowerShell Identity modules to request Kerberos tickets. This behavior is typically seen during a Kerberos or silver ticket attack. A successful execution will output the SPNs for the endpoint in question.
Rule metadata and linked tags
Author: frack113. Source status: test; severity: high. Source dates: 2021-12-28 / 2025-11-18.
{
"product": "windows",
"category": "ps_script",
"definition": "Requirements: Script Block Logging must be enabled"
}Pinned original Sigma rule · Detection Rule License 1.1
Source SHA-256: bf1771f8ab5922e357105d6c3a6947e6d96cc036718058c4946ac767eefd255a
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: Suspicious Kerberos Ticket Request via PowerShell Script - ScriptBlock
id: a861d835-af37-4930-bcd6-5b178bfb54df
related:
- id: caa9a802-8bd8-4b9e-a5cd-4d6221670219
type: similar
status: test
description: |
Detects PowerShell scripts that utilize native PowerShell Identity modules to request Kerberos tickets.
This behavior is typically seen during a Kerberos or silver ticket attack. A successful execution will output the SPNs for the endpoint in question.
references:
- https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1558.003/T1558.003.md#atomic-test-4---request-a-single-ticket-via-powershell
- https://learn.microsoft.com/en-us/dotnet/api/system.identitymodel.tokens.kerberosrequestorsecuritytoken?view=netframework-4.8.1
author: frack113
date: 2021-12-28
modified: 2025-11-18
tags:
- attack.credential-access
- attack.t1558.003
logsource:
product: windows
category: ps_script
definition: 'Requirements: Script Block Logging must be enabled'
detection:
selection:
ScriptBlockText|contains|all:
- 'System.IdentityModel.Tokens.KerberosRequestorSecurityToken'
- '.GetRequest()'
condition: selection
falsepositives:
- Unknown
level: high
False positives
- Unknown
Source references
- https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1558.003/T1558.003.md#atomic-test-4---request-a-single-ticket-via-powershell
- https://learn.microsoft.com/en-us/dotnet/api/system.identitymodel.tokens.kerberosrequestorsecuritytoken?view=netframework-4.8.1
Connected ecosystem references
Exact source-tagged techniques
Telemetry review
Read the original logsource above, then inspect the linked detection workspaces for technique-level sensor context. No per-rule telemetry equivalence is inferred.
Pinned research references. No browser attack runner, live simulation result or validated detector is asserted. Source mappings and validation limits are preserved. ATT&CK / Atomic provenance · Detection provenance.