TCP SYN (JA4T)

65535_2-1-3-1-1-8-4-0-0_1426_6

first seen 2026-08-17 09:17 · last seen 2026-09-29 12:33 · JSON

Decomposed attributes

TCP window	`65535`
Option kinds	`2-1-3-1-1-8-4-0-0`
MSS	`1426`
Window scale	`6`

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
`t12d380500_10ed599f3404_67a080e8974e`	2
`t13d1615h2_86a278354501_9f0199917760`	1

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11nn040000_5b1e8b5f4d2d_000000000000_000000000000`	2
`ge20nr10engb_d353d425b0bb_000000000000_000000000000`	1

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`3:100;4:8000000;2:0\|7934465\|0\|m,p,a,s`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`6:50+14:0:1426:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:ecn,flow:0`	1
`6:49+15:0:1426:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:ecn,flow:0`	1
`6:48+16:0:1426:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:ecn,flow:0`	1

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0`	2
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:153.0) Gecko/20100101 Firefox/153.0`	1

Country

fingerprint	co-occurrences
`GB` · United Kingdom	3

Network (ASN)

fingerprint	co-occurrences
`AS5607` · Sky UK Limited	3