Nasreddine Bencherchali
31 lines
898 B
YAML
31 lines
898 B
YAML
title: Failed NTLM Logins with Different Accounts from Single Source System
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id: 6309ffc4-8fa2-47cf-96b8-a2f72e58e538
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related:
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- id: e98374a6-e2d9-4076-9b5c-11bdb2569995
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type: derived
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status: unsupported
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description: Detects suspicious failed logins with different user accounts from a single source system
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author: Florian Roth (Nextron Systems)
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date: 2017/01/10
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modified: 2023/02/24
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tags:
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- attack.persistence
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- attack.privilege_escalation
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- attack.t1078
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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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selection2:
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EventID: 4776
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TargetUserName: '*'
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Workstation: '*'
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timeframe: 24h
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condition: selection2 | count(TargetUserName) by Workstation > 3
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falsepositives:
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- Terminal servers
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- Jump servers
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- Other multiuser systems like Citrix server farms
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- Workstations with frequently changing users
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level: medium
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