JA4 t12d1516h2_8daaf6152771_9fd9352597e4

t12d1516h2_8daaf6152771_9fd9352597e4

Shares its JA4_c (9fd9352597e4) with 3 fingerprints classified as browser, and nothing else in that family disagrees — the same tool under different cipher options. Inferred from the family, not observed directly.

What this fingerprint encodes

Transport

TCP

TLS version

TLS 1.2

Server name

server name sent

Cipher suites offered

15

Extensions offered

16

ALPN

h2

Same tool, different options

These 3 other fingerprints share this one's JA4_c — the extension and signature-algorithm hash. A client that keeps its extension set constant while varying its cipher list produces exactly this pattern, which is what a scanner iterating cipher suites looks like. A JA3 cannot show you this: its single MD5 collapses ciphers and extensions together, so every variation looks like an unrelated client.

• t13d151600_8daaf6152771_9fd9352597e4
• t13d1516h2_8daaf6152771_9fd9352597e4
• t13d1516ht_8daaf6152771_9fd9352597e4

The hello it was computed from

Recovered because the proxy now stores the pre-hash JA3 string alongside the digest. Every number below came out of this client's ClientHello; anything we cannot name in the IANA registry is shown as its raw value rather than guessed at.

Version

TLS 1.2

Cipher suites 15

• TLS_AES_128_GCM_SHA256
• TLS_AES_256_GCM_SHA384
• TLS_CHACHA20_POLY1305_SHA256
• TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
• TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
• TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
• TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
• TLS_RSA_WITH_AES_128_GCM_SHA256
• TLS_RSA_WITH_AES_256_GCM_SHA384
• TLS_RSA_WITH_AES_128_CBC_SHA
• TLS_RSA_WITH_AES_256_CBC_SHA

Extensions 16

• supported_versions
• signature_algorithms
• supported_groups
• session_ticket
• signed_certificate_timestamp
• application_settings
• key_share
• renegotiation_info
• application_layer_protocol_negotiation
• status_request
• server_name
• encrypted_client_hello
• ec_point_formats
• extended_master_secret
• psk_key_exchange_modes
• compress_certificate

Named groups 4

• X25519Kyber768Draft00
• x25519
• secp256r1
• secp384r1

Point formats 1

• uncompressed

771,4865-4866-4867-49195-49199-49196-49200-52393-52392-49171-49172-156-157-47-53,43-13-10-35-18-17513-51-65281-16-5-0-65037-11-23-45-27,25497-29-23-24,0

Seen in live traffic

Connections

1

First seen

2026-08-27 02:14 UTC

Last seen

2026-08-27 02:14 UTC

Transport

TCP

This entry is an observation, not a policy decision. It is here because the edge saw it, not because anyone reviewed it, and it blocks nothing on its own. Only the curated tier drives classification and banning.