47 lines
1.2 KiB
YAML
47 lines
1.2 KiB
YAML
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title: Reconnaissance Activity
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author: Florian Roth (rule), Jack Croock (method), Jonhnathan Ribeiro (improvements),
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oscd.community
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date: 2017/03/07
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description: Detects activity as "net user administrator /domain" and "net group domain
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admins /domain"
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detection:
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SELECTION_1:
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EventID: 4661
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SELECTION_2:
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ObjectType:
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- SAM_USER
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- SAM_GROUP
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SELECTION_3:
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ObjectName: S-1-5-21-*
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SELECTION_4:
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AccessMask: '0x2d'
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SELECTION_5:
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ObjectName:
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- '*-500'
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- '*-512'
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condition: (SELECTION_1 and SELECTION_2 and SELECTION_3 and SELECTION_4 and SELECTION_5)
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falsepositives:
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- Administrator activity
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- Penetration tests
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id: 968eef52-9cff-4454-8992-1e74b9cbad6c
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level: high
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logsource:
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definition: The volume of Event ID 4661 is high on Domain Controllers and therefore
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"Audit SAM" and "Audit Kernel Object" advanced audit policy settings are not configured
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in the recommendations for server systems
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product: windows
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service: security
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modified: 2020/08/23
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references:
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- https://findingbad.blogspot.de/2017/01/hunting-what-does-it-look-like.html
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status: experimental
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tags:
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- attack.discovery
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- attack.t1087
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- attack.t1087.002
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- attack.t1069
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- attack.t1069.002
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- attack.s0039
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ruletype: SIGMA
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