42 lines
1.0 KiB
YAML
42 lines
1.0 KiB
YAML
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title: NetNTLM Downgrade Attack
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author: Florian Roth, wagga
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date: 2018/03/20
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description: Detects NetNTLM downgrade attack
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detection:
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SELECTION_1:
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EventID: 4657
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SELECTION_2:
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ObjectName: '*\REGISTRY\MACHINE\SYSTEM*'
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SELECTION_3:
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ObjectName: '*ControlSet*'
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SELECTION_4:
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ObjectName: '*\Control\Lsa*'
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SELECTION_5:
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ObjectValueName:
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- LmCompatibilityLevel
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- NtlmMinClientSec
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- RestrictSendingNTLMTraffic
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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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- Unknown
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id: d3abac66-f11c-4ed0-8acb-50cc29c97eed
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level: critical
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logsource:
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definition: 'Requirements: Audit Policy : Object Access > Audit Registry (Success)'
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product: windows
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service: security
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modified: 2021/06/27
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references:
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- https://www.optiv.com/blog/post-exploitation-using-netntlm-downgrade-attacks
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related:
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- id: d67572a0-e2ec-45d6-b8db-c100d14b8ef2
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type: derived
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status: experimental
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tags:
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- attack.defense_evasion
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- attack.t1089
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- attack.t1562.001
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- attack.t1112
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ruletype: SIGMA
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