2018-03-20 14:03:55 +00:00
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---
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action: global
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2018-03-20 10:07:21 +00:00
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title: NetNTLM Downgrade Attack
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description: Detects post exploitation using NetNTLM downgrade attacks
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2018-12-25 13:25:12 +00:00
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references:
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2018-03-20 10:07:21 +00:00
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- https://www.optiv.com/blog/post-exploitation-using-netntlm-downgrade-attacks
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author: Florian Roth
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date: 2018/03/20
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2018-07-24 05:50:32 +00:00
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tags:
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- attack.credential_access
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- attack.t1212
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2018-03-20 14:03:55 +00:00
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detection:
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condition: 1 of them
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falsepositives:
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- Unknown
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level: critical
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---
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2018-03-20 10:07:21 +00:00
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logsource:
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product: windows
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service: sysmon
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detection:
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2018-03-20 14:03:55 +00:00
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selection1:
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2018-03-20 10:07:21 +00:00
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EventID: 13
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TargetObject:
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2019-02-02 23:24:57 +00:00
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- '*SYSTEM\\*ControlSet*\Control\Lsa\lmcompatibilitylevel'
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- '*SYSTEM\\*ControlSet*\Control\Lsa\NtlmMinClientSec'
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- '*SYSTEM\\*ControlSet*\Control\Lsa\RestrictSendingNTLMTraffic'
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2018-03-20 14:03:55 +00:00
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---
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# Windows Security Eventlog: Process Creation with Full Command Line
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logsource:
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product: windows
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service: security
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2018-11-15 06:00:06 +00:00
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definition: 'Requirements: Audit Policy : Object Access > Audit Registry (Success)'
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2018-03-20 14:03:55 +00:00
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detection:
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selection2:
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EventID: 4657
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2019-02-02 23:24:57 +00:00
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ObjectName: '\REGISTRY\MACHINE\SYSTEM\\*ControlSet*\Control\Lsa'
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2018-03-20 14:03:55 +00:00
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ObjectValueName:
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- 'LmCompatibilityLevel'
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- 'NtlmMinClientSec'
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- 'RestrictSendingNTLMTraffic'
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