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a3e02ea70f
* Field name: LogonProcess -> LogonProcessName * Field name: Message -> AuditPolicyChanges * Field name: ProcessCommandLine -> CommandLine * Removed Type match in Kerberos RC4 encryption rule Problematic because text representation not unified and audit failures are possibly interesting events * Removed field 'Severity' from rules (Redundant) * Rule decomposition of win_susp_failed_logons_single_source) because of different field names * Field name: SubjectAccountName -> SubjectUserName * Field name: TargetProcess -> TargetImage * Field name: TicketEncryption -> TicketEncryptionType * Field name: TargetFileName -> TargetFilename
22 lines
695 B
YAML
22 lines
695 B
YAML
title: Suspicious Kerberos RC4 Ticket Encryption
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status: experimental
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references:
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- https://adsecurity.org/?p=3458
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- https://www.trimarcsecurity.com/single-post/TrimarcResearch/Detecting-Kerberoasting-Activity
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description: Detects service ticket requests using RC4 encryption type
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logsource:
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product: windows
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service: security
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detection:
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selection:
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EventID: 4769
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TicketOptions: '0x40810000'
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TicketEncryptionType: '0x17'
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reduction:
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- ServiceName: '$*'
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condition: selection and not reduction
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falsepositives:
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- Service accounts used on legacy systems (e.g. NetApp)
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- Windows Domains with DFL 2003 and legacy systems
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level: medium
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