TLS ClientHello (JA4)

t13d1210h2_21b14c9ee09f_560390466015

first seen 2026-08-18 06:49 · last seen 2026-08-18 23:02 · JSON

Decomposed attributes

Protocolt (TLS over TCP)
TLS version13
SNId (domain)
Cipher count12
Extension count10
ALPNh2
Ciphers0035, 009d, 1301, 1302, 1303, c013, c02b, c02c, c02f, c030, cca8, cca9
Extensions000a, 000b, 000d, 0017, 002b, 002d, 0033, ff01
Signature algorithms0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601
JA4_rt13d1210h2_0035,009d,1301,1302,1303,c013,c02b,c02c,c02f,c030,cca8,cca9_000a,000b,000d,0017,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601
JA4_o (sample)t13d1210h2_cb055a4e88f2_36fcb826cc7b
JA4_ro (sample)t13d1210h2_1301,1302,1303,c030,c02f,0035,c013,cca8,c02c,009d,c02b,cca9_0017,002d,0000,002b,000a,0010,0033,ff01,000b,000d_0403,0804,0401,0503,0805,0501,0806,0601

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.

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn04enus_989c7cc05c9b_000000000000_0000000000002

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p2

TCP SYN (p0f)

fingerprintco-occurrences
4:54+10:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:54+10:0:1460:32768,10:mss,nop,ws,sok,ts::01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_71
32768_2-1-3-4-8_1460_101

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.2 Safari/537.361
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.2 Safari/537.361

Country

fingerprintco-occurrences
DE · Germany1
NL · Netherlands1

Network (ASN)

fingerprintco-occurrences
AS215125 · Church of Cyberology1
AS58087 · Florian Kolb1