Bitbucket User Login Failure Via SSH

calendar Jun 4, 2025 · attack.lateral-movement attack.credential-access attack.t1021.004 attack.t1110  ·
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Detects SSH user login access failures. Please note that this rule can be noisy and is recommended to use with correlation based on "author.name" field.

Sigma rule (View on GitHub)

 1title: Bitbucket User Login Failure Via SSH
 2id: d3f90469-fb05-42ce-b67d-0fded91bbef3
 3status: test
 4description: |
 5    Detects SSH user login access failures.
 6    Please note that this rule can be noisy and is recommended to use with correlation based on "author.name" field.    
 7references:
 8    - https://confluence.atlassian.com/bitbucketserver/view-and-configure-the-audit-log-776640417.html
 9    - https://confluence.atlassian.com/bitbucketserver/enable-ssh-access-to-git-repositories-776640358.html
10author: Muhammad Faisal (@faisalusuf)
11date: 2024-02-25
12tags:
13    - attack.lateral-movement
14    - attack.credential-access
15    - attack.t1021.004
16    - attack.t1110
17logsource:
18    product: bitbucket
19    service: audit
20    definition: 'Requirements: "Advance" log level is required to receive these audit events.'
21detection:
22    selection:
23        auditType.category: 'Authentication'
24        auditType.action: 'User login failed(SSH)'
25    condition: selection
26falsepositives:
27    - Legitimate user wrong password attempts.
28level: medium

References

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