TCP SYN (JA4T)

32768_2-1-3-4-8_1440_10

first seen 2026-06-30 05:27 · last seen 2026-07-17 00:55 · JSON

Decomposed attributes

TCP window	`32768`
Option kinds	`2-1-3-4-8`
MSS	`1440`
Window scale	`10`

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.

TLS ClientHello (JA4)

fingerprint	co-occurrences
`t13d1715h2_5b57614c22b0_a54fffd0eb61`	28

HTTP request (JA4H)

fingerprint	co-occurrences
`ge20nr12enus_a72b71f519fc_000000000000_000000000000`	15
`ge20nr11enus_187a9385d229_000000000000_000000000000`	8
`ge20nn12enus_a72b71f519fc_000000000000_000000000000`	4
`ge20nn14enus_f17998ff6631_000000000000_000000000000`	1

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`1:65536;2:0;4:131072;5:16384\|12517377\|3:0:0:42\|m,p,a,s` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.	6
`1:65536;2:0;4:131072;5:16384\|12517377\|3:0:0:22\|m,p,a,s` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 154.0, +25 more.The fingerprint page shows the full measured match list. More on the catalog.	4
`1:65536;2:0;4:131072;5:16384\|12517377\|7:0:0:22\|m,p,a,s` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 155.0, firefox 154.0, +3 more.The fingerprint page shows the full measured match list. More on the catalog.	2
`1:65536;2:0;4:131072;5:16384\|12517377\|13:0:0:42\|m,p,a,s`	2
`1:65536;2:0;4:131072;5:16384\|12517377\|5:0:0:22\|m,p,a,s` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 154.0, firefox 153.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog.	2
`1:65536;2:0;4:131072;5:16384\|12517377\|11:0:0:42\|m,p,a,s`	2
`1:65536;2:0;4:131072;5:16384\|12517377\|15:0:0:42\|m,p,a,s`	2
`1:65536;2:0;4:131072;5:16384\|12517377\|17:0:0:42\|m,p,a,s`	2
`1:65536;2:0;4:131072;5:16384\|12517377\|19:0:0:42\|m,p,a,s`	1
`1:65536;2:0;4:131072;5:16384\|12517377\|21:0:0:42\|m,p,a,s`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`6:47+17:0:1440:32768,10:mss,nop,ws,sok,ts:flow:0`	17
`6:48+16:0:1440:32768,10:mss,nop,ws,sok,ts:flow:0`	7
`6:49+15:0:1440:32768,10:mss,nop,ws,sok,ts:flow:0`	4

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.0`	22
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:140.0) Gecko/20100101 Firefox/140.0`	6

Country

fingerprint	co-occurrences
`NL` · Netherlands	28

Network (ASN)

fingerprint	co-occurrences
`AS215125` · Church of Cyberology	28