TCP SYN (JA4T)

65535_2-1-3-1-1-4_1398_8

first seen 2026-07-21 03:51 · last seen 2026-07-21 03:51 · JSON

Decomposed attributes

TCP window65535
Option kinds2-1-3-1-1-4
MSS1398
Window scale8

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)

fingerprintco-occurrences
t13d201200_2b729b4bf6f3_e24568c0d4401

HTTP request (JA4H)

fingerprintco-occurrences
po11nn07enus_7d361e250c48_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:108+20:0:1398:65535,8:mss,nop,ws,nop,nop,sok:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 6.3; x64) AppleWebKit/537.36 (KHTML, like Gecko) Edge/97.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
VN · Vietnam1

Network (ASN)

fingerprintco-occurrences
AS45899 · VNPT Corp1