TLS ClientHello (JA4)

t13d301100_1d37bd780c83_8e6e362c5eac

first seen 2026-07-01 14:32 · last seen 2026-09-21 17:12 · JSON

Decomposed attributes

Protocolt (TLS over TCP)
TLS version13
SNId (domain)
Cipher count30
Extension count11
ALPN00
Ciphers002f, 0033, 0035, 0039, 003c, 003d, 0067, 006b, 009c, 009d, 009e, 009f, 1301, 1302, 1303, c009, c00a, c013, c014, c023, c024, c027, c028, c02b, c02c, c02f, c030, cca8, cca9, ccaa
Extensions000a, 000b, 000d, 0016, 0017, 0023, 002b, 002d, 0033, ff01
Signature algorithms0905, 0906, 0904, 0403, 0503, 0603, 0807, 0808, 081a, 081b, 081c, 0809, 080a, 080b, 0804, 0805, 0806, 0401, 0501, 0601, 0303, 0301, 0302, 0402, 0502, 0602
JA4_rt13d301100_002f,0033,0035,0039,003c,003d,0067,006b,009c,009d,009e,009f,1301,1302,1303,c009,c00a,c013,c014,c023,c024,c027,c028,c02b,c02c,c02f,c030,cca8,cca9,ccaa_000a,000b,000d,0016,0017,0023,002b,002d,0033,ff01_0905,0906,0904,0403,0503,0603,0807,0808,081a,081b,081c,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0301,0302,0402,0502,0602
JA4_o (sample)t13d301100_8d44cdc55eec_b609e078c809
JA4_ro (sample)t13d301100_1302,1303,1301,c02c,c030,009f,cca9,cca8,ccaa,c02b,c02f,009e,c024,c028,006b,c023,c027,0067,c00a,c014,0039,c009,c013,0033,009d,009c,003d,003c,0035,002f_ff01,0000,000b,000a,0023,0016,0017,000d,002b,002d,0033_0905,0906,0904,0403,0503,0603,0807,0808,081a,081b,081c,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0301,0302,0402,0502,0602

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
ge11nn040000_2393fd559033_000000000000_0000000000002
ge11nn020000_d5c75abc5c2c_000000000000_0000000000002
ge11nn030000_47c2bbddfa85_000000000000_0000000000002
ge11nn020000_e1391afd0c9d_000000000000_0000000000001
ge11nn040000_08e7224bf8c7_000000000000_0000000000001
ge11nn07enus_9cffa57b58a3_000000000000_0000000000001
ge11nr020000_e1391afd0c9d_000000000000_0000000000001
he11nn020000_e1391afd0c9d_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
6:41+23:0:1440:mss*30,11:mss,sok,ts,nop,ws:flow:02
4:53+11:0:1380:mss*47,10:mss,sok,ts,nop,ws:df,id+:01
4:46+18:0:1460:65535,8:mss,nop,ws,sok,ts:df:01
4:51+13:0:1460:65535,8:mss,nop,ws,sok,ts:df:01
4:45+19:0:1460:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:01
4:44+20:0:1460:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:01
4:51+13:0:1452:mss*44,10:mss,sok,ts,nop,ws:df,id+:01
4:52+12:0:1380:mss*47,10:mss,sok,ts,nop,ws:df,id+:01
4:46+18:0:1452:mss*44,10:mss,sok,ts,nop,ws:df,id+:01
4:52+12:0:1452:mss*44,10:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1452_103
65535_2-1-3-1-1-8-4-0-0_1460_62
64860_2-4-8-1-3_1380_102
65535_2-1-3-4-8_1460_82
43200_2-4-8-1-3_1440_112

User-Agent

fingerprintco-occurrences
codex-tui/0.154.0 (Ubuntu 22.4.0; x86_64) xterm-256color2
Drakma/2.0.10 (SBCL 2.6.1; FreeBSD; 15.0-RELEASE-p4; http://weitz.de/drakma/)1
Mozilla/5.0 (X11; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.01

Country

fingerprintco-occurrences
US · United States6
MA · Morocco3
AT · Austria2

Network (ASN)

fingerprintco-occurrences
AS36903 · Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM3
AS7922 · Comcast Cable Communications, LLC3
AS197540 · netcup GmbH2
AS19318 · Interserver, Inc2
AS21581 · M5 Computer Security1