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unrecognised fingerprint

t12d500400_5e02f30799ee_b2b06344fbdd

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 ALPN2026-07-23 → 2026-07-23
JA4
JA4_r
JA3
JA3_raw
This JA3 resolves unambiguously to the JA4 above.

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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 90 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

90
observations
1
domains reached
2026-07-23
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(50)
  1. 00xc024TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
  2. 10xc028TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
  3. 20x003dTLS_RSA_WITH_AES_256_CBC_SHA256
  4. 30xc026unknown (0xc026)
  5. 40xc02aunknown (0xc02a)
  6. 50x006bTLS_DHE_RSA_WITH_AES_256_CBC_SHA256
  7. 60x006aTLS_DHE_DSS_WITH_AES_256_CBC_SHA256
  8. 70xc00aTLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
  9. 80xc014TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
  10. 90x0035TLS_RSA_WITH_AES_256_CBC_SHA
  11. 100xc005unknown (0xc005)
  12. 110xc00funknown (0xc00f)
  13. 120x0039TLS_DHE_RSA_WITH_AES_256_CBC_SHA
  14. 130x0038TLS_DHE_DSS_WITH_AES_256_CBC_SHA
  15. 140xc023TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
  16. 150xc027TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
  17. 160x003cTLS_RSA_WITH_AES_128_CBC_SHA256
  18. 170xc025unknown (0xc025)
  19. 180xc029unknown (0xc029)
  20. 190x0067TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
  21. 200x0040TLS_DHE_DSS_WITH_AES_128_CBC_SHA256
  22. 210xc009TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
  23. 220xc013TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
  24. 230x002fTLS_RSA_WITH_AES_128_CBC_SHA
  25. 240xc004unknown (0xc004)
  26. 250xc00eunknown (0xc00e)
  27. 260x0033TLS_DHE_RSA_WITH_AES_128_CBC_SHA
  28. 270x0032TLS_DHE_DSS_WITH_AES_128_CBC_SHA
  29. 280xc02cTLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
  30. 290xc02bTLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
  31. 300xc030TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
  32. 310x009dTLS_RSA_WITH_AES_256_GCM_SHA384
  33. 320xc02eunknown (0xc02e)
  34. 330xc032unknown (0xc032)
  35. 340x009fTLS_DHE_RSA_WITH_AES_256_GCM_SHA384
  36. 350x00a3TLS_DHE_DSS_WITH_AES_256_GCM_SHA384
  37. 360xc02fTLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
  38. 370x009cTLS_RSA_WITH_AES_128_GCM_SHA256
  39. 380xc02dunknown (0xc02d)
  40. 390xc031unknown (0xc031)
  41. 400x009eTLS_DHE_RSA_WITH_AES_128_GCM_SHA256
  42. 410x00a2TLS_DHE_DSS_WITH_AES_128_GCM_SHA256
  43. 420xc008unknown (0xc008)
  44. 430xc012unknown (0xc012)
  45. 440x000aunknown (0x000a)
  46. 450xc003unknown (0xc003)
  47. 460xc00dunknown (0xc00d)
  48. 470x0016unknown (0x0016)
  49. 480x0013unknown (0x0013)
  50. 490x00ffTLS_EMPTY_RENEGOTIATION_INFO
extensions(4)sorted
  1. 00x0000server_name (SNI)
  2. 10x000asupported_groups
  3. 20x000bec_point_formats
  4. 30x000dsignature_algorithms

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

curves / groups(3)
  1. 00x0017secp256r1 (P-256)
  2. 10x0018secp384r1 (P-384)
  3. 20x0019secp521r1 (P-521)
signature algorithms(11)
  1. 00x0603ecdsa_secp521r1_sha512
  2. 10x0601rsa_pkcs1_sha512
  3. 20x0503ecdsa_secp384r1_sha384
  4. 30x0501rsa_pkcs1_sha384
  5. 40x0403ecdsa_secp256r1_sha256
  6. 50x0401rsa_pkcs1_sha256
  7. 60x0402rsa_pkcs1_sha384
  8. 70x0203ecdsa_sha1
  9. 80x0201rsa_pkcs1_sha1
  10. 90x0202unknown (0x0202)
  11. 100x0101unknown (0x0101)

Reach — domains contacted

Top 1 of 1. Share is the fraction of this fingerprint’s observations reaching each name.