splunk-security_content/detections/cloud/github_security_advisor_alert.yml

name: GitHub Security Advisor Alert
id: 05032b04-4469-4034-9df7-05f607d75cba
version: 1
date: '2021-09-01'
author: Patrick Bareiss, Splunk
type: Anomaly
datamodel: []
description: This search looks for Security Advisor Alerts in Github logs.
search: '`github` alert.id=* action=create 
  | rename repository.full_name as repository, repository.html_url as repository_url
  | stats min(_time) as firstTime max(_time) as lastTime by action alert.affected_package_name 
  alert.affected_range alert.created_at alert.external_identifier alert.external_reference alert.fixed_in 
  alert.severity repository repository_url
  | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
  | `github_security_advisor_alert_filter`'
how_to_implement: You must index GitHub logs. You can follow the url in reference to onboard GitHub logs.
known_false_positives: unknown
references:
- https://www.splunk.com/en_us/blog/tips-and-tricks/getting-github-data-with-webhooks.html
tags:
  analytic_story:
  - Dev Sec Ops
  asset_type: GitHub
  cis20:
  - CIS 13
  confidence: 90
  impact: 30
  kill_chain_phases:
  - Actions on Objectives
  message: Vulnerabilities found in packages used by GitHub repository $repository$
  mitre_attack_id:
  - T1195.001
  nist:
  - PR.DS
  - PR.AC
  - DE.CM
  observable:
  - name: repository
    type: System
    role:
    - Victim
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  - Dev Sec Ops Analytics
  required_fields:
  - _time
  - alert.id
  - repository.full_name
  - repository.html_url
  - action
  - alert.affected_package_name
  - alert.affected_range
  - alert.created_at
  - alert.external_identifier
  - alert.external_reference
  - alert.fixed_in
  - alert.severity
  risk_score: 21
  security_domain: network