TLS ClientHello (JA4)

t13d1515h2_8daaf6152771_e4c2b8c727f2

first seen 2026-09-01 14:01 · last seen 2026-09-01 14:01 · JSON

Inconsistencies

User-Agents observed with this fingerprint that contradict what it proves at the wire. all inconsistencies →

fingerprint User-Agent claims wire shows confidence seen first seen last seen

t13d1515h2_8daaf6152771_e4c2b8c727f2

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleW…

User-Agent claims Chrome 152.0.0.0

TLS extensions or signature algorithms differ from every measured Chrome capture

The cipher suites match Chrome, but the extension set or signature algorithms differ from every capture even after normalizing handshake-variant extensions. Most likely a field-trial, ECH, or build variant the catalog has not captured; occasionally mimicry. This sharpens as catalog coverage grows.

Full User-Agent	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36
Claimed version	152.0.0.0
Measured versions	149.0.7827.103, 149.0.7827.53, 149.0.7827.115, 153.0.8010.47, 149.0.7827.54, 155.0.8059.79, 153.0.8010.36, 151.0.7922.170, 156.0.8078.48, 152.0.7977.82, 152.0.7977.65, 156.0.8078.73, 156.0.8078.74, 155.0.8059.84, 150.0.7871.129, 155.0.8059.40, 154.0.8037.58, 151.0.7922.173, 149.0.7827.156, 151.0.7922.71, 150.0.7871.128, 154.0.8037.97, 149.0.7827.155, 151.0.7922.109, 152.0.7977.64, 156.0.8078.79, 149.0.7827.200, 151.0.7922.174, 153.0.8010.53, 149.0.7827.114, 154.0.8037.57, 149.0.7827.201, 150.0.7871.187, 152.0.7977.83, 153.0.8010.52, 150.0.7871.114, 155.0.8059.39, 150.0.7871.115, 151.0.7922.72, 151.0.7922.137, 152.0.7977.75, 154.0.8037.92, 156.0.8078.47, 149.0.7827.102, 151.0.7922.108, 150.0.7871.125, 150.0.7871.46, 148.0.7778.179
Layer	cipher suites match; extension set or signature algorithms differ
JA4 label	unlabeled

low

2026-09-01

Decomposed attributes

Protocol	`t (TLS over TCP)`
TLS version	`13`
SNI	`d (domain)`
Cipher count	`15`
Extension count	`15`
ALPN	`h2`
Ciphers	`002f, 0035, 009c, 009d, 1301, 1302, 1303, c013, c014, c02b, c02c, c02f, c030, cca8, cca9`
Extensions	`0005, 000a, 000b, 000d, 0012, 0017, 001b, 0023, 002b, 002d, 0033, fe0d, ff01`
Signature algorithms	`0904, 0905, 0906, 0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601`
JA4_r	`t13d1515h2_002f,0035,009c,009d,1301,1302,1303,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0017,001b,0023,002b,002d,0033,fe0d,ff01_0904,0905,0906,0403,0804,0401,0503,0805,0501,0806,0601`
JA4_o (sample)	`t13d1515h2_acb858a92679_4817f1aab386`
JA4_ro (sample)	`t13d1515h2_1301,1302,1303,c02b,c02f,c02c,c030,cca9,cca8,c013,c014,009c,009d,002f,0035_fe0d,002b,0010,0005,0023,ff01,0000,000b,002d,000d,0012,0033,0017,001b,000a_0904,0905,0906,0403,0804,0401,0503,0805,0501,0806,0601`

Co-observed signals

Signals from other families seen in the same observation. A fingerprint spread thinly across many lower-layer signatures is a classic inconsistency signal.

HTTP request (JA4H)

fingerprint	co-occurrences
`ge20nn13ptbr_0c2c1d640f3e_000000000000_000000000000`	2
`ge20nn020000_b89ce445e0b3_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.27.1, go-net/http 1.27.3, +14 more.The fingerprint page shows the full measured match list. More on the catalog.	1

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`1:65536;2:0;4:6291456;6:262144\|15663105\|0\|m,a,s,p`	3

TCP SYN (p0f)

fingerprint	co-occurrences
`6:48+16:0:1420:mss*45,8:mss,nop,ws,nop,nop,sok:flow:0`	2
`6:47+17:0:1420:mss*45,8:mss,nop,ws,nop,nop,sok:flow:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`64800_2-1-3-1-1-4_1420_8`	3

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36`	2
`urllib3.future/2.24.905`	1

Country

fingerprint	co-occurrences
`BR` · Brazil	3

Network (ASN)

fingerprint	co-occurrences
`AS7738` · V tal	3