TCP SYN (JA4T)

42780_2-4-8-1-3_1380_9

first seen 2026-07-11 00:43 · last seen 2026-07-26 02:03 · JSON

Decomposed attributes

TCP window	`42780`
Option kinds	`2-4-8-1-3`
MSS	`1380`
Window scale	`9`

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
`t13d141000_cbb2034c60b8_e7c285222651` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.22.12.The fingerprint page shows the full measured match list. More on the catalog.	12

HTTP request (JA4H)

fingerprint	co-occurrences
`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.	6
`he11nn020000_818f42cc3fd7_000000000000_000000000000`	3
`po11nn040000_b9c176b8216c_000000000000_000000000000`	3

TCP SYN (p0f)

fingerprint	co-occurrences
`4:49+15:0:1380:mss*31,9:mss,sok,ts,nop,ws:df,id+:0`	4
`4:48+16:0:1380:mss*31,9:mss,sok,ts,nop,ws:df,id+:0`	4
`4:44+20:0:1380:mss*31,9:mss,sok,ts,nop,ws:df,id+:0`	2
`4:45+19:0:1380:mss*31,9:mss,sok,ts,nop,ws:df,id+:0`	2

User-Agent

fingerprint	co-occurrences
`Go-http-client/1.1`	12

Country

fingerprint	co-occurrences
`NL` · Netherlands	12

Network (ASN)

fingerprint	co-occurrences
`AS34343` · BIP Backbone ASN	12