TLS ClientHello (JA4)

t13d141000_cbb2034c60b8_e7c285222651

first seen 2026-06-11 02:14 · last seen 2026-10-25 15:02 · 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

t13d141000_cbb2034c60b8_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

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:133.0) Gecko/20100101 Firefox/133.0
Claimed version	133.0
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, 144.0.2, 154.0.1, 134.0
Layer	cipher suites differ
JA4 label	unlabeled

medium

2026-08-11

2026-08-14

Last 7 days (3 observations)

Distinct clients per day (last 30 days, peak 6/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	`14`
Extension count	`10`
ALPN	`00`
Ciphers	`1301, 1302, 1303, c009, c00a, c012, 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	`t13d141000_1301,1302,1303,c009,c00a,c012,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)	`t13d141000_d6258c3c5426_7afa19738a2d`
JA4_ro (sample)	`t13d141000_c02b,c02f,c02c,c030,cca9,cca8,c009,c013,c00a,c014,c012,1301,1302,1303_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
`ge11nr06enus_aeac3047b50b_000000000000_000000000000`	102
`ge11nn020000_818f42cc3fd7_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: php-guzzle 8.2.0, php-guzzle 8.1.0, php-guzzle 8.0.2, +13 more.The fingerprint page shows the full measured match list. More on the catalog.	40
`ge11nn050000_a1c329e38462_000000000000_000000000000`	39
`ge11nn030000_cd680697de12_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.6, powershell 7.6.5, powershell 7.6.4, +11 more.The fingerprint page shows the full measured match list. More on the catalog.	37
`ge11nr030000_cd680697de12_000000000000_000000000000`	20
`ge11nr05enus_813e32c09d15_000000000000_000000000000`	18
`ge11nn040000_e1d2031bdfea_000000000000_000000000000`	11
`ge11nr040000_e1d2031bdfea_000000000000_000000000000`	10
`he11nn020000_818f42cc3fd7_000000000000_000000000000`	8
`ge11nn020000_3ed38b250d3d_000000000000_000000000000`	7

TCP SYN (p0f)

fingerprint	co-occurrences
`4:50+14:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	60
`4:51+13:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	48
`4:58+6:0:1420:mss*46,7:mss,sok,ts,nop,ws:df,id+:0`	45
`4:56+8:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	35
`4:55+9:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	20
`4:53+11:0:1460:mss*29,11:mss,sok,ts,nop,ws:df,id+:0`	19
`4:56+8:0:1460:mss*29,11:mss,sok,ts,nop,ws:df,id+:0`	13
`4:50+14:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	11
`4:46+18:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	10
`4:48+16:0:1280:mss*34,9:mss,sok,ts,nop,ws:df,id+:0`	7

TCP SYN (JA4T)

fingerprint	co-occurrences
`64240_2-4-8-1-3_1460_10`	146
`64240_2-4-8-1-3_1460_7`	67
`65320_2-4-8-1-3_1420_7`	39
`42340_2-4-8-1-3_1460_11`	16
`42780_2-4-8-1-3_1380_9`	12
`43520_2-4-8-1-3_1280_9`	12
`43200_2-4-8-1-3_1440_9`	3
`42625_2-4-8-1-3_1375_9`	3
`29200_2-4-8-1-3_1460_7`	2
`64800_2-4-8-1-3_1440_7`	2

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36`	166
`Hello from Palo Alto Networks, find out more about our scans in https://docs-cortex.paloaltonetworks.com/r/1/Cortex-Xpanse/Scanning-activity`	47
`Go-http-client/1.1`	34
`Mozilla/5.0 (Linux; arm_64; Android 12; CPH2205) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 YaBrowser/23.3.3.86.00 SA/3 Mobile Safari/537.36`	22
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36`	9
`Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36`	6
`Mozilla/5.0 (compatible; PBX-Scanner/1.0)`	5
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36`	3
`Mozilla/5.0 (X11; Linux x86_64)`	3
`Mozilla/5.0`	2

Country

fingerprint	co-occurrences
`NL` · Netherlands	216
`US` · United States	37
`RU` · Russia	22
`FR` · France	13
`TW` · Taiwan	10
`BR` · Brazil	9
`BE` · Belgium	8
`ID` · Indonesia	5
`PL` · Poland	5
`GB` · United Kingdom	3

Network (ASN)

fingerprint	co-occurrences
`AS218785` · TC DATACENTER LIMITED	143
`AS396982` · Google LLC	47
`AS48090` · TECHOFF SRV LIMITED	33
`AS34343` · BIP Backbone ASN	27
`AS200107` · Kaspersky Lab Switzerland GmbH	22
`AS46475` · Limestone Networks, Inc.	13
`AS51167` · Contabo GmbH	7
`AS51396` · Pfcloud UG	6
`AS201814` · MEVSPACE sp. z o.o.	5
`AS209101` · IP Vendetta Inc.	4

TLS supported groups

fingerprint	co-occurrences
`001d,0017,0018,0019` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13.The fingerprint page shows the full measured match list. More on the catalog.	10