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unrecognised fingerprint

t13i1811h1_85036bcba153_b26ce05bbdd6

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 1.3ALPN http/1.12026-07-19 → 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 44 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

44
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 1.3
ALPN (wire order)
http/1.1
EC point formats
0x0000, 0x0001, 0x0002
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(18)
  1. 00x1302TLS_AES_256_GCM_SHA384
  2. 10x1303TLS_CHACHA20_POLY1305_SHA256
  3. 20x1301TLS_AES_128_GCM_SHA256
  4. 30xc02cTLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
  5. 40xc030TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
  6. 50xc02bTLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
  7. 60xc02fTLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
  8. 70xcca9TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305
  9. 80xcca8TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305
  10. 90xc024TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
  11. 100xc028TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
  12. 110xc023TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
  13. 120xc027TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
  14. 130x009fTLS_DHE_RSA_WITH_AES_256_GCM_SHA384
  15. 140x009eTLS_DHE_RSA_WITH_AES_128_GCM_SHA256
  16. 150x006bTLS_DHE_RSA_WITH_AES_256_CBC_SHA256
  17. 160x0067TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
  18. 170x00ffTLS_EMPTY_RENEGOTIATION_INFO
extensions(11)sorted
  1. 00x000asupported_groups
  2. 10x000bec_point_formats
  3. 20x000dsignature_algorithms
  4. 30x0010application_layer_protocol_negotiation (ALPN)
  5. 40x0015padding
  6. 50x0016encrypt_then_mac
  7. 60x0017extended_master_secret
  8. 70x002bsupported_versions
  9. 80x002dpsk_key_exchange_modes
  10. 90x0031post_handshake_auth
  11. 100x0033key_share

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

curves / groups(10)
  1. 00x001dx25519
  2. 10x0017secp256r1 (P-256)
  3. 20x001ex448
  4. 30x0019secp521r1 (P-521)
  5. 40x0018secp384r1 (P-384)
  6. 50x0100ffdhe2048
  7. 60x0101ffdhe3072
  8. 70x0102ffdhe4096
  9. 80x0103ffdhe6144
  10. 90x0104ffdhe8192
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