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Detection rules › Sigma

Bitbucket Secret Scanning Exempt Repository Added

Status
test
Severity
high
Log source
product bitbucket, service audit
Author
Muhammad Faisal (@faisalusuf)
Source
github.com/SigmaHQ/sigma

Detects when a repository is exempted from secret scanning feature.

Known false positives

  • Legitimate user activity.

MITRE ATT&CK coverage

TacticTechniques
Defense Impairment

Rule body

title: Bitbucket Secret Scanning Exempt Repository Added
id: b91e8d5e-0033-44fe-973f-b730316f23a1
status: test
description: Detects when a repository is exempted from secret scanning feature.
references:
    - https://confluence.atlassian.com/bitbucketserver/audit-log-events-776640423.html
    - https://confluence.atlassian.com/bitbucketserver/secret-scanning-1157471613.html
author: Muhammad Faisal (@faisalusuf)
date: 2024-02-25
tags:
    - attack.defense-impairment
    - attack.t1685
logsource:
    product: bitbucket
    service: audit
    definition: 'Requirements: "Basic" log level is required to receive these audit events.'
detection:
    selection:
        auditType.category: 'Repositories'
        auditType.action: 'Secret scanning exempt repository added'
    condition: selection
falsepositives:
    - Legitimate user activity.
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    auditType.category: 'Repositories'
    auditType.action: 'Secret scanning exempt repository added'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
auditType.actioneq
  • Secret scanning exempt repository added
field:"auditType.action" kind:eq value:"Secret scanning exempt repository added"
auditType.categoryeq
  • Repositories
field:"auditType.category" kind:eq value:"Repositories"