Detection rules › Sigma
Bitbucket Unauthorized Access To A Resource
Detects unauthorized access attempts to a resource.
Known false positives
- Access attempts to non-existent repositories or due to outdated plugins. Usually "Anonymous" user is reported in the "author.name" field in most cases.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Resource Development |
Rule body
title: Bitbucket Unauthorized Access To A Resource
id: 7215374a-de4f-4b33-8ba5-70804c9251d3
status: test
description: Detects unauthorized access attempts to a resource.
references:
- https://confluence.atlassian.com/bitbucketserver/audit-log-events-776640423.html
author: Muhammad Faisal (@faisalusuf)
date: 2024-02-25
tags:
- attack.resource-development
- attack.t1586
logsource:
product: bitbucket
service: audit
definition: 'Requirements: "Advance" log level is required to receive these audit events.'
detection:
selection:
auditType.category: 'Security'
auditType.action: 'Unauthorized access to a resource'
condition: selection
falsepositives:
- Access attempts to non-existent repositories or due to outdated plugins. Usually "Anonymous" user is reported in the "author.name" field in most cases.
level: critical
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
auditType.category: 'Security'
auditType.action: 'Unauthorized access to a resource'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
auditType.action | eq |
| field:"auditType.action" kind:eq value:"Unauthorized access to a resource" |
auditType.category | eq |
| field:"auditType.category" kind:eq value:"Security" |