{
  "generated": "2026-10-30T18:37:43.766Z",
  "source": "https://publicmosaic.com",
  "tlp": "CLEAR",
  "scope": "template a373a9f83c6b_2bab15409345_0f2217ba412e — https://publicmosaic.com/ja4x/a373a9f83c6b_2bab15409345_0f2217ba412e",
  "caveat": "Combine with network scope. A JA4X names a certificate template, which everyone using the same tooling shares; a template seen on several families is a library default. discriminating: false marks singletons and multi-family templates. JA4X+ entries (template, issuer CN and not-before day) are a finer key.",
  "templates": [
    {
      "ja4x": "a373a9f83c6b_2bab15409345_0f2217ba412e",
      "url": "/ja4x/a373a9f83c6b_2bab15409345_0f2217ba412e",
      "hosts": 1,
      "listed": 0,
      "families": [
        "quasar_rat"
      ],
      "networks": [
        9294
      ],
      "first_seen": "2026-09-05T17:02:07.346Z",
      "last_seen": "2026-09-23T17:48:25.168Z",
      "discriminating": false,
      "plus": [
        {
          "issuer_cn": "Microsoft TLS G2 RSA CA OCSP 04",
          "not_before_day": "2026-01-22",
          "hosts": 1,
          "listed": 0
        }
      ]
    }
  ]
}