TLS ClientHello (JA4)

t13d301100_1d37bd780c83_8e6e362c5eac

first seen 2026-07-01 14:32 · last seen 2026-09-15 15:58 · JSON

Last 7 days (3 observations)

Distinct clients per day (last 30 days, peak 1/day)

Distinct clients are counted by IP-hash per complete UTC day — unlike observation counts this is insensitive to one chatty client, but NAT merges clients and address rotation splits them.

Decomposed attributes

Protocol	`t (TLS over TCP)`
TLS version	`13`
SNI	`d (domain)`
Cipher count	`30`
Extension count	`11`
ALPN	`00`
Ciphers	`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`
Extensions	`000a, 000b, 000d, 0016, 0017, 0023, 002b, 002d, 0033, ff01`
Signature algorithms	`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_r	`t13d301100_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)

fingerprint	co-occurrences
`ge11nn040000_2393fd559033_000000000000_000000000000`	2
`ge11nn020000_d5c75abc5c2c_000000000000_000000000000`	2
`ge11nn030000_47c2bbddfa85_000000000000_000000000000`	2
`ge11nn020000_e1391afd0c9d_000000000000_000000000000`	1
`ge11nn040000_08e7224bf8c7_000000000000_000000000000`	1
`ge11nn07enus_9cffa57b58a3_000000000000_000000000000`	1
`he11nn020000_e1391afd0c9d_000000000000_000000000000`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`6:41+23:0:1440:mss*30,11:mss,sok,ts,nop,ws:flow:0`	2
`4:53+11:0:1380:mss*47,10:mss,sok,ts,nop,ws:df,id+:0`	1
`4:46+18:0:1460:65535,8:mss,nop,ws,sok,ts:df:0`	1
`4:51+13:0:1460:65535,8:mss,nop,ws,sok,ts:df:0`	1
`4:45+19:0:1460:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:0`	1
`4:44+20:0:1460:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:0`	1
`4:51+13:0:1452:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	1
`4:52+12:0:1380:mss*47,10:mss,sok,ts,nop,ws:df,id+:0`	1
`4:52+12:0:1452:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-1-3-1-1-8-4-0-0_1460_6`	2
`64860_2-4-8-1-3_1380_10`	2
`65535_2-1-3-4-8_1460_8`	2
`64240_2-4-8-1-3_1452_10`	2
`43200_2-4-8-1-3_1440_11`	2

User-Agent

fingerprint	co-occurrences
`codex-tui/0.154.0 (Ubuntu 22.4.0; x86_64) xterm-256color`	2
`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/121.0`	1

Country

fingerprint	co-occurrences
`US` · United States	6
`AT` · Austria	2
`MA` · Morocco	2

Network (ASN)

fingerprint	co-occurrences
`AS7922` · Comcast Cable Communications, LLC	3
`AS36903` · Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	2
`AS197540` · netcup GmbH	2
`AS19318` · Interserver, Inc	2
`AS21581` · M5 Computer Security	1