Detection rules › Sigma
Bitbucket User Login Failure
Detects user authentication failure events. Please note that this rule can be noisy and it is recommended to use with correlation based on "author.name" field.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Initial Access | T1078.004 Valid Accounts: Cloud Accounts |
| Persistence | T1078.004 Valid Accounts: Cloud Accounts |
| Privilege Escalation | T1078.004 Valid Accounts: Cloud Accounts |
| Stealth | T1078.004 Valid Accounts: Cloud Accounts |
| Credential Access | T1110 Brute Force |
Rule body yaml
title: Bitbucket User Login Failure
id: 70ed1d26-0050-4b38-a599-92c53d57d45a
status: test
description: |
Detects user authentication failure events.
Please note that this rule can be noisy and it is recommended to use with correlation based on "author.name" field.
references:
- https://confluence.atlassian.com/bitbucketserver/audit-log-events-776640423.html
author: Muhammad Faisal (@faisalusuf)
date: 2024-02-25
tags:
- attack.privilege-escalation
- attack.persistence
- attack.initial-access
- attack.credential-access
- attack.stealth
- attack.t1078.004
- attack.t1110
logsource:
product: bitbucket
service: audit
definition: 'Requirements: "Advance" log level is required to receive these audit events.'
detection:
selection:
auditType.category: 'Authentication'
auditType.action: 'User login failed'
condition: selection
falsepositives:
- Legitimate user wrong password attempts.
level: medium
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
auditType.category: 'Authentication'
auditType.action: 'User login failed'
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
auditType.action | eq |
|
auditType.category | eq |
|