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unrecognised fingerprint

t12i270600_a2460661a67a_eed5f1524d5c

Deterministic client

One JA3 across every connection — a deterministic stack, the shape of a library or command-line client, with no catalogue name yet.

TLS 1.2no ALPN2026-07-19 → 2026-07-23
JA4
JA4_r
JA3
JA3_raw

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catalog identity
No ground-truth build has reproduced this hello yet — absence is not a verdict.
self-randomisation
fixed — one JA3 across 293 connections: a deterministic stack. Libraries and command-line clients look like this.
reach
0.000effectively one destination.

Spread measures reach, not intent: it can’t tell one scraper visiting 500 domains from 500 people visiting one each. Stability is a claim about software — whether the stack is deterministic — nothing about who runs it.

Footprint

293
observations
0
domains reached
2026-07-19
first seen
2026-07-23
last seen

ClientHello anatomy

The underscore groups of JA4_r are the raw cipher suites · extensions · signature algorithms behind the hash.

TLS version
TLS 1.2
ALPN (wire order)
—
EC point formats
0x0000
Post-quantum key share
absent

The post-quantum key share is a structural fact about the hello, not a verdict — GREASE values are flagged the same neutral way.

cipher suites(27)
  1. 00xc02cTLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
  2. 10xc030TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
  3. 20x009fTLS_DHE_RSA_WITH_AES_256_GCM_SHA384
  4. 30xcca9TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305
  5. 40xcca8TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305
  6. 50xccaaTLS_DHE_RSA_WITH_CHACHA20_POLY1305
  7. 60xc02bTLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
  8. 70xc02fTLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
  9. 80x009eTLS_DHE_RSA_WITH_AES_128_GCM_SHA256
  10. 90xc024TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
  11. 100xc028TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
  12. 110x006bTLS_DHE_RSA_WITH_AES_256_CBC_SHA256
  13. 120xc023TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
  14. 130xc027TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
  15. 140x0067TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
  16. 150xc00aTLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
  17. 160xc014TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
  18. 170x0039TLS_DHE_RSA_WITH_AES_256_CBC_SHA
  19. 180xc009TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
  20. 190xc013TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
  21. 200x0033TLS_DHE_RSA_WITH_AES_128_CBC_SHA
  22. 210x009dTLS_RSA_WITH_AES_256_GCM_SHA384
  23. 220x009cTLS_RSA_WITH_AES_128_GCM_SHA256
  24. 230x003dTLS_RSA_WITH_AES_256_CBC_SHA256
  25. 240x003cTLS_RSA_WITH_AES_128_CBC_SHA256
  26. 250x0035TLS_RSA_WITH_AES_256_CBC_SHA
  27. 260x002fTLS_RSA_WITH_AES_128_CBC_SHA
extensions(6)sorted
  1. 00x000asupported_groups
  2. 10x000bec_point_formats
  3. 20x000dsignature_algorithms
  4. 30x0016encrypt_then_mac
  5. 40x0017extended_master_secret
  6. 50xff01renegotiation_info

Stored sorted — under one JA4 the wire order varies by construction, so no single order is “the” order.

curves / groups(7)
  1. 00x001dx25519
  2. 10x0017secp256r1 (P-256)
  3. 20x001ex448
  4. 30x0018secp384r1 (P-384)
  5. 40x0019secp521r1 (P-521)
  6. 50x0100ffdhe2048
  7. 60x0101ffdhe3072
signature algorithms(20)
  1. 00x0403ecdsa_secp256r1_sha256
  2. 10x0503ecdsa_secp384r1_sha384
  3. 20x0603ecdsa_secp521r1_sha512
  4. 30x0807ed25519
  5. 40x0808ed448
  6. 50x0809rsa_pss_pss_sha256
  7. 60x080arsa_pss_pss_sha384
  8. 70x080brsa_pss_pss_sha512
  9. 80x0804rsa_pss_rsae_sha256
  10. 90x0805rsa_pss_rsae_sha384
  11. 100x0806rsa_pss_rsae_sha512
  12. 110x0401rsa_pkcs1_sha256
  13. 120x0501rsa_pkcs1_sha384
  14. 130x0601rsa_pkcs1_sha512
  15. 140x0303rsa_pkcs1_sha512 (legacy)
  16. 150x0301rsa_pkcs1_sha256 (legacy)
  17. 160x0302rsa_pkcs1_sha384 (legacy)
  18. 170x0402rsa_pkcs1_sha384
  19. 180x0502ecdsa_secp384r1_sha384
  20. 190x0602ecdsa_secp521r1_sha512