Samirbous
8d34416049
* [Deprecated Rule] Potential Privilege Escalation via Local Kerberos Relay over LDAP FPs in certain cases with no room for tuning. * Update privilege_escalation_krbrelayup_suspicious_logon.toml Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
76 lines
2.3 KiB
TOML
76 lines
2.3 KiB
TOML
[metadata]
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creation_date = "2022/04/26"
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deprecation_date = "2022/08/01"
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maturity = "deprecated"
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updated_date = "2022/08/01"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies a suspicious local successful logon event where the Logon Package is Kerberos, the remote address is set to
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localhost, and the target user SID is the built-in local Administrator account. This may indicate an attempt to leverage
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a Kerberos relay attack variant that can be used to elevate privilege locally from a domain joined limited user to local
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System privileges.
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"""
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from = "now-9m"
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index = ["winlogbeat-*", "logs-system.*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Potential Privilege Escalation via Local Kerberos Relay over LDAP"
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references = [
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"https://github.com/Dec0ne/KrbRelayUp",
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"https://googleprojectzero.blogspot.com/2021/10/using-kerberos-for-authentication-relay.html",
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"https://github.com/cube0x0/KrbRelay",
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]
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risk_score = 73
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rule_id = "3605a013-6f0c-4f7d-88a5-326f5be262ec"
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severity = "high"
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tags = ["Elastic", "Host", "Windows", "Threat Detection", "Privilege Escalation", "Credential Access"]
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type = "eql"
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query = '''
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authentication where
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/* event 4624 need to be logged */
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event.action == "logged-in" and event.outcome == "success" and
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/* authenticate locally via relayed kerberos ticket */
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winlog.event_data.AuthenticationPackageName : "Kerberos" and winlog.logon.type == "Network" and
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source.ip == "127.0.0.1" and source.port > 0 and
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/* Impersonate Administrator user via S4U2Self service ticket */
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winlog.event_data.TargetUserSid : "S-1-5-21-*-500"
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'''
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1548"
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name = "Abuse Elevation Control Mechanism"
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reference = "https://attack.mitre.org/techniques/T1548/"
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[[rule.threat.technique.subtechnique]]
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id = "T1548.002"
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name = "Bypass User Account Control"
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reference = "https://attack.mitre.org/techniques/T1548/002/"
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[rule.threat.tactic]
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id = "TA0004"
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name = "Privilege Escalation"
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reference = "https://attack.mitre.org/tactics/TA0004/"
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1558"
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name = "Steal or Forge Kerberos Tickets"
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reference = "https://attack.mitre.org/techniques/T1558/"
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[rule.threat.tactic]
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id = "TA0006"
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name = "Credential Access"
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reference = "https://attack.mitre.org/tactics/TA0006/"
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