TLS ClientHello (JA4)

t13d1714h1_5b57614c22b0_43ade6aba3df

first seen 2026-06-19 16:55 · last seen 2026-10-31 09:50 · 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

t13d1714h1_5b57614c22b0_43ade6aba3df

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

User-Agent claims Chrome 150.0.0.0

TLS cipher list matches no measured Chrome capture

The offered TLS cipher suites match no controlled capture of Chrome. Cipher lists are very stable per browser, so a different one is a real inconsistency — though a TLS-inspecting proxy re-originating the handshake is an honest cause, which holds this at medium.

Full User-Agent	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36
Claimed version	150.0.0.0
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 differ
JA4 label	unlabeled

medium

2026-08-17

t13d1714h1_5b57614c22b0_43ade6aba3df

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:150…

User-Agent claims Firefox 150.0

TLS extensions or signature algorithms differ from every measured Firefox capture

The cipher suites match Firefox, 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; rv:150.0) Gecko/20100101 Firefox/150.0
Claimed version	150.0
Measured versions	146.0.1, 154.0, 140.0.2, 157.0.1, 151.0.2, 155.0, 153.0.3, 142.0.1, 153.0.4, 152.0.6, 150.0.2, 135.0, 156.0.1, 132.0, 152.0.3, 141.0, 153.0, 151.0.3, 156.0, 152.0.4, 151.0, 152.0.1, 151.0.4, 139.0, 153.0.1, 158.0.1, 152.0.5, 157.0, 158.0, 148.0.2, 137.0, 155.0.1, 159.0, 144.0.2, 154.0.1, 134.0
Layer	cipher suites match; extension set or signature algorithms differ
JA4 label	unlabeled

low

2026-07-01

t13d1714h1_5b57614c22b0_43ade6aba3df

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:135…

User-Agent claims Firefox 135.0

TLS extensions or signature algorithms differ from every measured Firefox capture

Full User-Agent	Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:135.0) Gecko/20100101 Firefox/135.0
Claimed version	135.0
Measured versions	146.0.1, 154.0, 140.0.2, 157.0.1, 151.0.2, 155.0, 153.0.3, 142.0.1, 153.0.4, 152.0.6, 150.0.2, 135.0, 156.0.1, 132.0, 152.0.3, 141.0, 153.0, 151.0.3, 156.0, 152.0.4, 151.0, 152.0.1, 151.0.4, 139.0, 153.0.1, 158.0.1, 152.0.5, 157.0, 158.0, 148.0.2, 137.0, 155.0.1, 159.0, 144.0.2, 154.0.1, 134.0
Layer	cipher suites match; extension set or signature algorithms differ
JA4 label	unlabeled

low

2026-07-04

2026-07-26

t13d1714h1_5b57614c22b0_43ade6aba3df

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:151…

User-Agent claims Firefox 151.0

TLS extensions or signature algorithms differ from every measured Firefox capture

Full User-Agent	Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:151.0) Gecko/20100101 Firefox/151.0
Claimed version	151.0
Measured versions	146.0.1, 154.0, 140.0.2, 157.0.1, 151.0.2, 155.0, 153.0.3, 142.0.1, 153.0.4, 152.0.6, 150.0.2, 135.0, 156.0.1, 132.0, 152.0.3, 141.0, 153.0, 151.0.3, 156.0, 152.0.4, 151.0, 152.0.1, 151.0.4, 139.0, 153.0.1, 158.0.1, 152.0.5, 157.0, 158.0, 148.0.2, 137.0, 155.0.1, 159.0, 144.0.2, 154.0.1, 134.0
Layer	cipher suites match; extension set or signature algorithms differ
JA4 label	unlabeled

low

2026-07-04

Last 7 days (2 observations)

Distinct clients per day (last 30 days, peak 2/day)

Distinct clients are counted by IP-hash per complete UTC day — unlike observation counts this is insensitive to one chatty client, but NAT merges clients and address rotation splits them.

Decomposed attributes

Protocol	`t (TLS over TCP)`
TLS version	`13`
SNI	`d (domain)`
Cipher count	`17`
Extension count	`14`
ALPN	`h1`
Ciphers	`002f, 0035, 009c, 009d, 1301, 1302, 1303, c009, c00a, c013, c014, c02b, c02c, c02f, c030, cca8, cca9`
Extensions	`0005, 000a, 000b, 000d, 0012, 0015, 0017, 0023, 002b, 002d, 0033, ff01`
Signature algorithms	`0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601, 0201`
JA4_r	`t13d1714h1_002f,0035,009c,009d,1301,1302,1303,c009,c00a,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0015,0017,0023,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601,0201`
JA4_o (sample)	`t13d1714h1_bbc337f0a232_345c1640beb9`
JA4_ro (sample)	`t13d1714h1_1301,1302,1303,c02b,c02f,c02c,c030,cca9,cca8,c009,c013,c00a,c014,009c,009d,002f,0035_0000,0017,ff01,000a,000b,0023,0010,0005,000d,0012,0033,002d,002b,0015_0403,0804,0401,0503,0805,0501,0806,0601,0201`

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
`ge11nn050000_5ddb03fb9e99_000000000000_000000000000`	11
`ge11nn040000_217776c81665_000000000000_000000000000`	10
`ge11nn08enus_0e9bd3873e9d_000000000000_000000000000`	10
`ge11nn040000_4f6f4aad0c1e_000000000000_000000000000`	5
`ge11nr040000_e046cd015f21_000000000000_000000000000`	4
`ge11nr06enus_4a866391d276_000000000000_000000000000`	2
`ge11nn05enus_6c708d44224e_000000000000_000000000000`	2
`ge11nn040000_e9f51a8d70f3_000000000000_000000000000`	1
`ge11nn050000_3d8abb5cc55c_000000000000_000000000000`	1
`ge11nn050000_eef1501076a8_000000000000_000000000000`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:44+20:0:1412:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:0`	5
`4:47+17:0:1460:mss*44,9:mss,sok,ts,nop,ws:df,id+:0`	5
`4:47+17:0:1460:62720,7:mss,sok,ts,nop,ws:df,id+:0`	5
`4:46+18:0:1280:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:0`	4
`4:48+16:0:1460:65535,10:mss,sok,ts,nop,ws:df,id+:0`	3
`4:55+9:0:1460:65535,10:mss,sok,ts,nop,ws:df,id+:0`	3
`4:48+16:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	2
`4:42+22:0:1412:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:0`	2
`4:54+10:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	2
`4:46+18:0:1452:mss*5,9:mss,sok,ts,nop,ws:df,id+:0`	2

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-4-8-1-3_1460_10`	8
`62720_2-4-8-1-3_1460_7`	6
`64240_2-4-8-1-3_1460_10`	5
`64240_2-4-8-1-3_1460_9`	5
`65535_2-1-3-1-1-8-4-0-0_1280_6`	4
`42340_2-4-8-1-3_1460_9`	2
`7300_2-4-8-1-3_1452_9`	2
`64240_2-4-8-1-3_1460_7`	1
`64800_2-4-8-1-3_1440_7`	1
`64240_2-1-3-1-1-4_1460_8`	1

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36`	10
`understory/0.1 (CT research; https://github.com/0x4b) +contact-via-repo`	7
`curl/8.7.1`	6
`Dalvik/2.1.0 (Linux; U; Android 17; sdk_gphone64_x86_64 Build/CE2A.260420.019)`	5
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_1) AppleWebKit/601.2.4 (KHTML, like Gecko) Version/9.0.1 Safari/601.2.4 facebookexternalhit/1.1 Facebot Twitterbot/1.0`	4
`bun-fingerprint-check/1.0`	4
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36`	4
`Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:150.0) Gecko/20100101 Firefox/150.0`	2
`Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:135.0) Gecko/20100101 Firefox/135.0`	2
`Bun/1.3.14`	2

Country

fingerprint	co-occurrences
`DE` · Germany	10
`NL` · Netherlands	7
`CN` · China	7
`US` · United States	6
`IL` · Israel	5
`AU` · Australia	4
`HK` · Hong Kong SAR China	3
`KR` · South Korea	2
`TR` · Turkey	2
`CA` · Canada	1

Network (ASN)

fingerprint	co-occurrences
`AS4134` · CHINANET BACKBONE	7
`AS31898` · Oracle Corporation	6
`AS197170` · TechTies Inc.	5
`AS28753` · Leaseweb Deutschland GmbH	4
`AS7545` · TPG Telecom Limited	4
`AS45102` · Alibaba (US) Technology Co., Ltd.	3
`AS50495` · web2objects GmbH	3
`AS132892` · Cloudflare, Inc.	3
`AS138997` · Eons Data Communications Limited	2
`AS34984` · Superonline Iletisim Hizmetleri A.S.	2

TLS supported groups

fingerprint	co-occurrences
`001d,0017,0018` Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28, rust-reqwest 0.11.27, winhttp 10.0.20348.1, +2 more.The fingerprint page shows the full measured match list. More on the catalog.	2