TLS ClientHello (JA4)

t13d131000_f57a46bbacb6_e7c285222651

first seen 2026-06-11 02:09 · last seen 2026-09-16 18:57 · 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

t13d131000_f57a46bbacb6_e7c285222651

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:140…

User-Agent claims Firefox 140.0

TLS cipher list matches no measured Firefox capture

The offered TLS cipher suites match no controlled capture of Firefox. 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; rv:140.0) Gecko/20100101 Firefox/140.0
Claimed version	140.0
Measured versions	146.0.1, 152.0.1, 154.0, 140.0.2, 151.0.4, 151.0.2, 139.0, 153.0.1, 155.0, 152.0.5, 153.0.3, 142.0.1, 153.0.4, 152.0.6, 150.0.2, 135.0, 132.0, 152.0.3, 148.0.2, 137.0, 141.0, 155.0.1, 153.0, 151.0.3, 144.0.2, 154.0.1, 134.0, 152.0.4, 151.0
Layer	cipher suites differ
JA4 label	unlabeled

medium

2026-06-30

2026-09-01

t13d131000_f57a46bbacb6_e7c285222651

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:133…

User-Agent claims Firefox 133.0

TLS cipher list matches no measured Firefox capture

Full User-Agent	Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:133.0) Gecko/20100101 Firefox/133.0
Claimed version	133.0
Measured versions	146.0.1, 152.0.1, 154.0, 140.0.2, 151.0.4, 151.0.2, 139.0, 153.0.1, 155.0, 152.0.5, 153.0.3, 142.0.1, 153.0.4, 152.0.6, 150.0.2, 135.0, 132.0, 152.0.3, 148.0.2, 137.0, 141.0, 155.0.1, 153.0, 151.0.3, 144.0.2, 154.0.1, 134.0, 152.0.4, 151.0
Layer	cipher suites differ
JA4 label	unlabeled

medium

2026-06-11

2026-09-09

t13d131000_f57a46bbacb6_e7c285222651

Mozilla/5.0 (X11; Linux x86_64; rv:135.0) Gecko/…

User-Agent claims Firefox 135.0

TLS cipher list matches no measured Firefox capture

Full User-Agent	Mozilla/5.0 (X11; Linux x86_64; rv:135.0) Gecko/20100101 Firefox/135.0
Claimed version	135.0
Measured versions	146.0.1, 152.0.1, 154.0, 140.0.2, 151.0.4, 151.0.2, 139.0, 153.0.1, 155.0, 152.0.5, 153.0.3, 142.0.1, 153.0.4, 152.0.6, 150.0.2, 135.0, 132.0, 152.0.3, 148.0.2, 137.0, 141.0, 155.0.1, 153.0, 151.0.3, 144.0.2, 154.0.1, 134.0, 152.0.4, 151.0
Layer	cipher suites differ
JA4 label	unlabeled

medium

2026-07-25

2026-09-10

Last 7 days (52 observations)

Distinct clients per day (last 30 days, peak 10/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	`13`
Extension count	`10`
ALPN	`00`
Ciphers	`1301, 1302, 1303, c009, c00a, c013, c014, c02b, c02c, c02f, c030, cca8, cca9`
Extensions	`0005, 000a, 000b, 000d, 0012, 0017, 002b, 0033, ff01`
Signature algorithms	`0804, 0403, 0807, 0805, 0806, 0401, 0501, 0601, 0503, 0603, 0201, 0203`
JA4_r	`t13d131000_1301,1302,1303,c009,c00a,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0017,002b,0033,ff01_0804,0403,0807,0805,0806,0401,0501,0601,0503,0603,0201,0203`
JA4_o (sample)	`t13d131000_45672f90a73c_7afa19738a2d`
JA4_ro (sample)	`t13d131000_c02b,c02f,c02c,c030,cca9,cca8,c009,c013,c00a,c014,1301,1302,1303_0000,000b,ff01,0017,0012,0005,000a,000d,002b,0033_0804,0403,0807,0805,0806,0401,0501,0601,0503,0603,0201,0203`

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
`ge11nn10zhcn_9c0cf7475f83_000000000000_000000000000`	1271
`ge11nr10zhcn_9c0cf7475f83_000000000000_000000000000`	345
`ge11nn08zhcn_bd35aedc6348_000000000000_000000000000`	171
`ge11nn10zhcn_986c3fb09fa9_000000000000_000000000000`	160
`ge11nr08zhcn_bd35aedc6348_000000000000_000000000000`	129
`ge11nr030000_cd680697de12_000000000000_000000000000`	71
`ge11nn030000_cd680697de12_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.5, powershell 7.6.4, go-net/http 1.27.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.	46
`ge11nr05zhcn_f3bb7aa45ec4_000000000000_000000000000`	44
`ge11nn05enus_813e32c09d15_000000000000_000000000000`	36
`ge11nr10zhcn_986c3fb09fa9_000000000000_000000000000`	28

TCP SYN (p0f)

fingerprint	co-occurrences
`4:50+14:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:0`	443
`4:49+15:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:0`	315
`4:53+11:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:0`	285
`4:51+13:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:0`	261
`4:47+17:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:0`	209
`4:52+12:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:0`	162
`4:43+21:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:0`	93
`4:45+19:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:0`	78
`4:44+20:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:0`	78
`4:56+8:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:0`	74

TCP SYN (JA4T)

fingerprint	co-occurrences
`29200_2-4-8-1-3_1424_7`	1583
`64240_2-4-8-1-3_1460_7`	76
`42340_2-4-8-1-3_1460_12`	70
`64860_2-4-8-1-3_1410_7`	29
`64240_2-4-8-1-3_1460_10`	28
`64952_2-4-8-1-3_1412_7`	28
`64620_2-4-8-1-3_1436_7`	25
`64240_2-4-8-1-3_1412_7`	14
`32476_2-4-8-1-3_1412_7`	14
`64240_2-1-3-1-1-4_1460_8`	12

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1`	2104
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 Edg/120.0.0.0`	62
`Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:140.0) Gecko/20100101 Firefox/140.0`	28
`Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:133.0) Gecko/20100101 Firefox/133.0`	20
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36`	19
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36`	18
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36`	18
`Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36`	17
`Mozilla/5.0 (X11; Linux x86_64; rv:135.0) Gecko/20100101 Firefox/135.0`	14
`Mozilla/5.0 (compatible; foda-scanner/0.1)`	14

Country

fingerprint	co-occurrences
`DE` · Germany	499
`US` · United States	473
`BR` · Brazil	387
`KR` · South Korea	346
`HK` · Hong Kong SAR China	334
`JP` · Japan	230
`NL` · Netherlands	109
`ID` · Indonesia	49
`CN` · China	29
`SE` · Sweden	21

Network (ASN)

fingerprint	co-occurrences
`AS132203` · Tencent Building, Kejizhongyi Avenue	2104
`AS48090` · TECHOFF SRV LIMITED	84
`AS135377` · UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED	62
`AS22295` · Advin Services LLC	39
`AS141679` · China Telecom Beijing Tianjin Hebei Big Data Industry Park Branch	29
`AS204770` · UAB "Cherry Servers"	28
`AS400529` · Infraly, LLC	26
`AS14061` · DigitalOcean, LLC	21
`AS51747` · Internet Vikings International AB	13
`AS396982` · Google LLC	11