id: azure-takeover-detection

info:
  name: Microsoft Azure Takeover Detection
  author: pdteam
  severity: high
  description: Microsoft Azure is vulnerable to subdomain takeover attacks. Subdomain takeovers are a common, high-severity threat for organizations that regularly create and delete many resources. A subdomain takeover can occur when a DNS record points to a deprovisioned Azure resource.
  reference:
    - https://godiego.co/posts/STO/
    - https://docs.microsoft.com/en-us/azure/security/fundamentals/subdomain-takeover
    - https://cystack.net/research/subdomain-takeover-chapter-two-azure-services/
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
    cvss-score: 7.2
    cwe-id: CWE-404
  tags: dns,takeover,azure

dns:
  - name: "{{FQDN}}"
    type: A

    matchers-condition: and
    matchers:
      - type: word
        words:
          - "azure-api.net"
          - "azure-mobile.net"
          - "azurecontainer.io"
          - "azurecr.io"
          - "azuredatalakestore.net"
          - "azureedge.net"
          - "azurefd.net"
          - "azurehdinsight.net"
          - "azurewebsites.net"
          - "azurewebsites.windows.net"
          - "blob.core.windows.net"
          - "cloudapp.azure.com"
          - "cloudapp.net"
          - "database.windows.net"
          - "redis.cache.windows.net"
          - "search.windows.net"
          - "servicebus.windows.net"
          - "trafficmanager.net"
          - "visualstudio.com"

      - type: word
        words:
          - "NXDOMAIN"

    extractors:
      - type: regex
        group: 1
        regex:
          - "IN\tCNAME\t(.+)"

# Enhanced by mp on 2022/03/13