Bitbucket audit: Project secret scanning allowlist rule added

Alerts when Bitbucket records a project secret scanning allowlist rule being added via the audit log.

FreeReviewedSigma · Low · v5

Product: bitbucket
Service: audit
Author: Muhammad Faisal (@faisalusuf) (SigmaHQ), DRL 1.1
Published: 2024-02-25
Updated: 2026-07-31

ATT&CK techniques

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule flags Bitbucket audit events where a secret scanning allowlist rule is added for a project. Attackers can use allowlists to bypass or reduce the effectiveness of secret detection, making the change an indicator of defense impairment. It relies on Bitbucket audit telemetry capturing the audit type category as Projects and the specific action for adding the allowlist rule.

Reporting behind it

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Bitbucket audit: Project secret scanning allowlist rule added

Pivot detection · T1685 · 9 related

Changelog

v5
Candidate ingested via manual entry.2026-07-31
v4
Candidate ingested via manual entry.2026-07-31
v3
Candidate ingested via manual entry.2026-07-31
v2
Candidate ingested via manual entry.2026-07-31
v1
No changelog recorded for this version.2026-07-30

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

bitbucket-audit-project-secret-scanning-allowlist-rule-added-42ccce6d

title: "Bitbucket audit: Project secret scanning allowlist rule added"
id: 365be920-8c7f-49fc-9266-d67d49e41db8
status: test
description: This rule flags Bitbucket audit events where a secret scanning allowlist rule is added for a project. Attackers can use allowlists to bypass or reduce the effectiveness of secret detection, making the change an indicator of defense impairment. It relies on Bitbucket audit telemetry capturing the audit type category as Projects and the specific action for adding the allowlist rule.
references:
  - https://confluence.atlassian.com/bitbucketserver/audit-log-events-776640423.html
  - https://confluence.atlassian.com/bitbucketserver/secret-scanning-1157471613.html
  - https://github.com/SigmaHQ/sigma/blob/master/rules/application/bitbucket/audit/bitbucket_audit_project_secret_scanning_allowlist_added.yml
author: Muhammad Faisal (@faisalusuf), Huntrule Team
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
    auditType.action: Project secret scanning allowlist rule added
  condition: selection
falsepositives:
  - Legitimate user activity.
level: low
license: DRL-1.1
related:
  - id: 42ccce6d-7bd3-4930-95cd-e4d83fa94a30
    type: derived

Convert

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