misp-objects/objects/ja3/definition.json

{
  "name": "ja3",
  "meta-category": "network",
  "description": "JA3 is a new technique for creating SSL client fingerprints that are easy to produce and can be easily shared for threat intelligence. Fingerprints are composed of Client Hello packet; SSL Version, Accepted Ciphers, List of Extensions, Elliptic Curves, and Elliptic Curve Formats. https://github.com/salesforce/ja3",
  "version": 2,
  "uuid": "09b45449-5d6e-492c-a68a-cb2e188cbfac",
  "attributes": {
    "ja3-fingerprint-md5": {
      "description": "Hash identifying source",
      "misp-attribute": "md5",
      "ui-priority": 1,
      "categories": [
        "Network activity",
        "External analysis"
      ]
    },
    "description": {
      "description": "Type of detected software ie software, malware",
      "misp-attribute": "text",
      "ui-priority": 1,
      "categories": [
        "Network activity",
        "External analysis"
      ]
    },
    "ip-src": {
      "description": "Source IP Address",
      "misp-attribute": "ip-src",
      "categories": [
        "Network activity",
        "External analysis"
      ],
      "ui-priority": 1
    },
    "ip-dst": {
      "description": "Destination IP address",
      "misp-attribute": "ip-dst",
      "categories": [
        "Network activity",
        "External analysis"
      ],
      "ui-priority": 1
    },
    "first-seen": {
      "misp-attribute": "datetime",
      "disable_correlation": true,
      "ui-priority": 0,
      "description": "First seen of the SSL/TLS handshake"
    },
    "last-seen": {
      "misp-attribute": "datetime",
      "disable_correlation": true,
      "description": "Last seen of the SSL/TLS handshake",
      "ui-priority": 0
    }
  },
  "required": [
    "ja3-fingerprint-md5"
  ]
}