{"id":"749c9f5e-b353-4b90-a9c1-05243357ca4b","title":"Potential Privilege Escalation via Local Kerberos Relay over LDAP","description":"Detects a suspicious local successful logon event where the Logon Package is Kerberos, the remote address is set to localhost, and the target user SID is the built-in local Administrator account.\nThis may indicate an attempt to leverage a Kerberos relay attack variant that can be used to elevate privilege locally from a domain joined limited user to local System privileges.\n","author":"Elastic, @SBousseaden","status":"test","level":"high","date":"2022-04-27","modified":"2024-08-13","tags":["attack.privilege-escalation","attack.credential-access","attack.t1548"],"technique_ids":["T1548"],"logsource":{"product":"windows","service":"security"},"falsepositives":["Unknown"],"references":["https://twitter.com/sbousseaden/status/1518976397364056071?s=12&t=qKO5eKHvWhAP19a50FTZ7g","https://github.com/elastic/detection-rules/blob/5fe7833312031a4787e07893e27e4ea7a7665745/rules/_deprecated/privilege_escalation_krbrelayup_suspicious_logon.toml#L38"],"source_path":"rules/windows/builtin/security/account_management/win_security_susp_privesc_kerberos_relay_over_ldap.yml","source_sha256":"360241bead399ee3e55e57776325e16a6833d78fadea76647a6187d33f1cbf79","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/builtin/security/account_management/win_security_susp_privesc_kerberos_relay_over_ldap.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Potential Privilege Escalation via Local Kerberos Relay over LDAP\nid: 749c9f5e-b353-4b90-a9c1-05243357ca4b\nstatus: test\ndescription: |\n    Detects a suspicious local successful logon event where the Logon Package is Kerberos, the remote address is set to localhost, and the target user SID is the built-in local Administrator account.\n    This may indicate an attempt to leverage a Kerberos relay attack variant that can be used to elevate privilege locally from a domain joined limited user to local System privileges.\nreferences:\n    - https://twitter.com/sbousseaden/status/1518976397364056071?s=12&t=qKO5eKHvWhAP19a50FTZ7g\n    - https://github.com/elastic/detection-rules/blob/5fe7833312031a4787e07893e27e4ea7a7665745/rules/_deprecated/privilege_escalation_krbrelayup_suspicious_logon.toml#L38\nauthor: Elastic, @SBousseaden\ndate: 2022-04-27\nmodified: 2024-08-13\ntags:\n    - attack.privilege-escalation\n    - attack.credential-access\n    - attack.t1548\nlogsource:\n    product: windows\n    service: security\ndetection:\n    selection:\n        EventID: 4624\n        LogonType: 3\n        AuthenticationPackageName: 'Kerberos'\n        IpAddress: '127.0.0.1'\n        TargetUserSid|startswith: 'S-1-5-21-'\n        TargetUserSid|endswith: '-500'\n    filter_main_ip_null:\n        IpPort: '0'\n    condition: selection and not 1 of filter_main_*\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1548","id":"T1548","name":"Abuse Elevation Control Mechanism","page":"techniques/enterprise/T1548/"}],"data_path":"data/detection-rules/749c9f5e-b353-4b90-a9c1-05243357ca4b.json","kind":"sigma"}