TCP SYN (JA4T)

4200_2-1-3-4-0-0_1400_2

first seen 2026-07-18 09:06 · last seen 2026-07-22 01:46 · JSON

Decomposed attributes

TCP window	`4200`
Option kinds	`2-1-3-4-0-0`
MSS	`1400`
Window scale	`2`

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
`t13d1516h2_8daaf6152771_d8a2da3f94cd` Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, chrome 149.0.7827.156, +25 more.The fingerprint page shows the full measured match list. More on the catalog.	14
`t13d1616h2_86a278354501_eeeea6562960`	4
`t13d3112h2_e8f1e7e78f70_b26ce05bbdd6` Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.5.0, php-curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog.	4
`t13d1615h2_86a278354501_5c2c66f702b0`	2
`t13i3111h2_e8f1e7e78f70_b26ce05bbdd6`	1

HTTP request (JA4H)

fingerprint	co-occurrences
`ge20nr12idid_d3f2873545ed_000000000000_000000000000`	7
`ge20nn020000_5594a17e7e7e_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.18.0, +9 more.The fingerprint page shows the full measured match list. More on the catalog.	5
`ge20nr10enus_b3034183f430_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 154.0, +21 more.The fingerprint page shows the full measured match list. More on the catalog.	4
`ge20nr13idid_0c2c1d640f3e_000000000000_000000000000`	3
`ge20nn10enus_d353d425b0bb_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 152.0.1.The fingerprint page shows the full measured match list. More on the catalog.	2
`ge20nn13idid_0c2c1d640f3e_000000000000_000000000000`	2
`ge20nn14idid_00c893c2b404_000000000000_000000000000`	1
`ge20nn15idid_5d43251a5d50_000000000000_000000000000`	1

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`3:100;4:10485760;2:0\|1048510465\|0\|m,s,a,p` Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0.The fingerprint page shows the full measured match list. More on the catalog.	5
`1:65536;2:0;4:6291456;6:262144\|15663105\|1:1:0:220\|m,a,s,p` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 149.0.7827.102, +59 more.The fingerprint page shows the full measured match list. More on the catalog.	4
`1:65536;2:0;4:6291456;6:262144\|15663105\|1:1:0:256\|m,a,s,p` Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +43 more.The fingerprint page shows the full measured match list. More on the catalog.	4
`1:4096;2:0;4:32768;5:16384\|12517377\|3:0:0:22\|m,p,a,s`	2
`1:65536;2:0;4:6291456;6:262144\|15663105\|3:1:0:220\|m,a,s,p` Match?Exact match in Thumbprint's published controlled catalog captures: chromium 151.0.7922.34, chromium 147.0.7727.15, chromium 145.0.7632.6, +21 more.The fingerprint page shows the full measured match list. More on the catalog.	2
`1:65536;2:0;4:6291456;6:262144\|15663105\|3:1:0:256\|m,a,s,p`	2
`1:4096;2:0;4:32768;5:16384\|12517377\|3:0:0:42\|m,p,a,s`	1
`1:4096;2:0;4:32768;5:16384\|12517377\|5:0:0:22\|m,p,a,s`	1
`1:4096;2:0;4:32768;5:16384\|12517377\|7:0:0:22\|m,p,a,s`	1
`1:4096;2:0;4:32768;5:16384\|12517377\|9:0:0:42\|m,p,a,s`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`6:48+16:0:1400:mss*3,2:mss,nop,ws,sok,eol+1::0`	17
`4:244+11:0:1400:mss*3,2:mss,nop,ws,sok,eol+1:df,id+:0`	8

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36`	10
`Mozilla/5.0 (Android 15; Mobile; rv:153.0) Gecko/153.0 Firefox/153.0`	6
`curl/8.5.0`	5
`Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36`	4

Country

fingerprint	co-occurrences
`ID` · Indonesia	25

Network (ASN)

fingerprint	co-occurrences
`AS23693` · PT. Telekomunikasi Selular	25

Cross-transport links

TLS ClientHello fingerprints observed from the same client via the beacon's correlation id on the other transport (e.g. this stack over TCP ↔ that stack over QUIC).

fingerprint	linked observations
`q13d0311h3_55b375c5d22e_653d80c3fe9d`	3

fingerprint	co-occurrences
`3:100;4:10485760;2:0\|1048510465\|0\|m,s,a,p` Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0.The fingerprint page shows the full measured match list. More on the catalog.	5
`1:65536;2:0;4:6291456;6:262144\|15663105\|1:1:0:220\|m,a,s,p` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 149.0.7827.102, +59 more.The fingerprint page shows the full measured match list. More on the catalog.	4
`1:65536;2:0;4:6291456;6:262144\|15663105\|1:1:0:256\|m,a,s,p` Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +43 more.The fingerprint page shows the full measured match list. More on the catalog.	4
`1:4096;2:0;4:32768;5:16384\|12517377\|3:0:0:22\|m,p,a,s`	2
`1:65536;2:0;4:6291456;6:262144\|15663105\|3:1:0:220\|m,a,s,p` Match?Exact match in Thumbprint's published controlled catalog captures: chromium 151.0.7922.34, chromium 147.0.7727.15, chromium 145.0.7632.6, +21 more.The fingerprint page shows the full measured match list. More on the catalog.	2
`1:65536;2:0;4:6291456;6:262144\|15663105\|3:1:0:256\|m,a,s,p`	2
`1:4096;2:0;4:32768;5:16384\|12517377\|3:0:0:42\|m,p,a,s`	1
`1:4096;2:0;4:32768;5:16384\|12517377\|5:0:0:22\|m,p,a,s`	1
`1:4096;2:0;4:32768;5:16384\|12517377\|7:0:0:22\|m,p,a,s`	1
`1:4096;2:0;4:32768;5:16384\|12517377\|9:0:0:42\|m,p,a,s`	1