TLS ClientHello (JA4)

t13d371100_db35923f8641_fa269c3d986d

first seen 2026-07-09 09:52 · last seen 2026-08-20 13:05 · JSON

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

Protocolt (TLS over TCP)
TLS version13
SNId (domain)
Cipher count37
Extension count11
ALPN00
Ciphers002f, 0032, 0033, 0035, 0038, 0039, 003c, 003d, 0040, 0067, 006a, 006b, 009c, 009d, 009e, 009f, 00a2, 00a3, 00ff, 1301, 1302, 1303, c009, c00a, c013, c014, c023, c024, c027, c028, c02b, c02c, c02f, c030, cca8, cca9, ccaa
Extensions0005, 000a, 000b, 000d, 0011, 0017, 002b, 002d, 0032, 0033
Signature algorithms0403, 0503, 0603, 0804, 0805, 0806, 0809, 080a, 080b, 0401, 0501, 0601, 0402, 0303, 0301, 0302, 0203, 0201, 0202
JA4_rt13d371100_002f,0032,0033,0035,0038,0039,003c,003d,0040,0067,006a,006b,009c,009d,009e,009f,00a2,00a3,00ff,1301,1302,1303,c009,c00a,c013,c014,c023,c024,c027,c028,c02b,c02c,c02f,c030,cca8,cca9,ccaa_0005,000a,000b,000d,0011,0017,002b,002d,0032,0033_0403,0503,0603,0804,0805,0806,0809,080a,080b,0401,0501,0601,0402,0303,0301,0302,0203,0201,0202
JA4_o (sample)t13d371100_2d73542302f3_a5ff6d8a13cd
JA4_ro (sample)t13d371100_003c,00a3,009c,0040,0067,009d,c013,0035,00a2,cca9,c028,009f,c027,009e,cca8,002f,c02c,c009,003d,c024,1301,c02b,0038,1302,006b,00ff,c00a,c023,006a,0039,c02f,0033,c014,1303,0032,c030,ccaa_0000,0005,000a,000b,000d,0032,0011,0017,002b,002d,0033_0403,0503,0603,0804,0805,0806,0809,080a,080b,0401,0501,0601,0402,0303,0301,0302,0203,0201,0202

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
ge11nn07enus_4222c6ea4e8a_000000000000_0000000000002

TCP SYN (p0f)

fingerprintco-occurrences
4:49+15:0:1410:mss*46,7:mss,sok,ts,nop,ws:df,id+:02

TCP SYN (JA4T)

fingerprintco-occurrences
64860_2-4-8-1-3_1410_72

User-Agent

fingerprintco-occurrences
OI-Crawler/Nutch (https://openintel.nl/webcrawl/)2

Country

fingerprintco-occurrences
NL · Netherlands2

Network (ASN)

fingerprintco-occurrences
AS1133 · University Twente2