id: starttls-mail-detect

info:
  name: STARTTLS Mail Server Detection
  author: r3dg33k
  severity: info
  description: |
    STARTTLS is an email protocol command that tells an email server that an email client, including an email client running in a web browser, wants to turn an existing insecure connection into a secure one.
  metadata:
    max-request: 1
  tags: mail,starttls,network,detect

tcp:
  - inputs:
      - data: "65686c6f20636865636b746c730a"
        type: hex
    read-size: 2048

    host:
      - "{{Hostname}}"
    port: 25

    matchers:
      - type: word
        words:
          - "250-STARTTLS"
# digest: 4a0a0047304502207260c91d920190376cdbf9aeafb1f771714fcb0385e75a7696cccb9c0c48efc80221008515736bf431c8ed3ef43888aff03fefe2de8fc9e3208f42e80e404041de9d0f:922c64590222798bb761d5b6d8e72950