itiB
34 lines
910 B
YAML
34 lines
910 B
YAML
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title: Suspicious Kerberos RC4 Ticket Encryption
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ruletype: Sigma
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author: Florian Roth
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date: 2017/02/06
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description: Detects service ticket requests using RC4 encryption type
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detection:
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SELECTION_1:
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EventID: 4769
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SELECTION_2:
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TicketOptions: '0x40810000'
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SELECTION_3:
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TicketEncryptionType: '0x17'
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SELECTION_4:
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ServiceName: $*
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condition: ((SELECTION_1 and SELECTION_2 and SELECTION_3) and not (SELECTION_4))
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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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id: 496a0e47-0a33-4dca-b009-9e6ca3591f39
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level: medium
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logsource:
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product: windows
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service: security
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modified: 2021/08/14
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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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status: experimental
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tags:
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- attack.credential_access
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- attack.t1208
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- attack.t1558.003
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