{"id":"a861d835-af37-4930-bcd6-5b178bfb54df","title":"Suspicious Kerberos Ticket Request via PowerShell Script - ScriptBlock","description":"Detects PowerShell scripts that utilize native PowerShell Identity modules to request Kerberos tickets.\nThis behavior is typically seen during a Kerberos or silver ticket attack. A successful execution will output the SPNs for the endpoint in question.\n","author":"frack113","status":"test","level":"high","date":"2021-12-28","modified":"2025-11-18","tags":["attack.credential-access","attack.t1558.003"],"technique_ids":["T1558.003"],"logsource":{"product":"windows","category":"ps_script","definition":"Requirements: Script Block Logging must be enabled"},"falsepositives":["Unknown"],"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"],"source_path":"rules/windows/powershell/powershell_script/posh_ps_request_kerberos_ticket.yml","source_sha256":"bf1771f8ab5922e357105d6c3a6947e6d96cc036718058c4946ac767eefd255a","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/powershell/powershell_script/posh_ps_request_kerberos_ticket.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Suspicious Kerberos Ticket Request via PowerShell Script - ScriptBlock\nid: a861d835-af37-4930-bcd6-5b178bfb54df\nrelated:\n    - id: caa9a802-8bd8-4b9e-a5cd-4d6221670219\n      type: similar\nstatus: test\ndescription: |\n    Detects PowerShell scripts that utilize native PowerShell Identity modules to request Kerberos tickets.\n    This behavior is typically seen during a Kerberos or silver ticket attack. A successful execution will output the SPNs for the endpoint in question.\nreferences:\n    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1558.003/T1558.003.md#atomic-test-4---request-a-single-ticket-via-powershell\n    - https://learn.microsoft.com/en-us/dotnet/api/system.identitymodel.tokens.kerberosrequestorsecuritytoken?view=netframework-4.8.1\nauthor: frack113\ndate: 2021-12-28\nmodified: 2025-11-18\ntags:\n    - attack.credential-access\n    - attack.t1558.003\nlogsource:\n    product: windows\n    category: ps_script\n    definition: 'Requirements: Script Block Logging must be enabled'\ndetection:\n    selection:\n        ScriptBlockText|contains|all:\n            - 'System.IdentityModel.Tokens.KerberosRequestorSecurityToken'\n            - '.GetRequest()'\n    condition: selection\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1558.003","id":"T1558.003","name":"Kerberoasting","page":"techniques/enterprise/T1558.003/"}],"data_path":"data/detection-rules/a861d835-af37-4930-bcd6-5b178bfb54df.json","kind":"sigma"}