2020-01-30 16:26:09 +00:00
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title: Failed Logins with Different Accounts from Single Source System
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2019-11-12 22:12:27 +00:00
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id: fc947f8e-ea81-4b14-9a7b-13f888f94e18
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2020-01-30 14:32:39 +00:00
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author: Florian Roth
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date: 2017/02/16
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2017-02-16 17:02:26 +00:00
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description: Detects suspicious failed logins with different user accounts from a single source system
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logsource:
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product: linux
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2017-09-10 22:35:52 +00:00
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service: auth
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2017-01-10 23:26:22 +00:00
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detection:
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selection:
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2019-11-12 22:12:27 +00:00
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pam_message: authentication failure
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2018-06-28 07:30:12 +00:00
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pam_user: '*'
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pam_rhost: '*'
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2019-11-12 22:12:27 +00:00
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timeframe: 24h
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2017-01-10 23:26:22 +00:00
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condition: selection | count(pam_user) by pam_rhost > 3
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falsepositives:
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- Terminal servers
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- Jump servers
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2019-11-12 22:12:27 +00:00
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- Workstations with frequently changing users
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2017-02-16 17:02:26 +00:00
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level: medium
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