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Detection rules › Sigma

Bitbucket Secret Scanning Rule Deleted

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

Detects when secret scanning rule is deleted for the project or repository.

Known false positives

  • Legitimate user activity.

MITRE ATT&CK coverage

TacticTechniques
Defense Impairment

Rule body

title: Bitbucket Secret Scanning Rule Deleted
id: ff91e3f0-ad15-459f-9a85-1556390c138d
status: test
description: Detects when secret scanning rule is deleted for the project or repository.
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:
            - 'Projects'
            - 'Repositories'
        auditType.action:
            - 'Project secret scanning rule deleted'
            - 'Repository secret scanning rule deleted'
    condition: selection
falsepositives:
    - Legitimate user activity.
level: low

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    auditType.category:
        - 'Projects'
        - 'Repositories'
    auditType.action:
        - 'Project secret scanning rule deleted'
        - 'Repository secret scanning rule deleted'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
auditType.actioneq
  • Project secret scanning rule deleted
  • Repository secret scanning rule deleted
field:"auditType.action" kind:eq
auditType.categoryeq
  • Projects
  • Repositories
field:"auditType.category" kind:eq