TLS ClientHello (JA4)

t13d1012h2_01be160bb49b_36bf25f296df

first seen 2026-10-13 12:06 · last seen 2026-10-13 20:52 · JSON

Distinct clients per day (last 30 days, peak 4/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	`10`
Extension count	`12`
ALPN	`h2`
Ciphers	`1301, 1302, c023, c024, c027, c028, c02b, c02c, c02f, c030`
Extensions	`000a, 000b, 000d, 0017, 0023, 002b, 002d, 0031, 0033, ff01`
Signature algorithms	`0804, 0805, 0806, 0401, 0501, 0201, 0403, 0503, 0203, 0202, 0601, 0603`
JA4_r	`t13d1012h2_1301,1302,c023,c024,c027,c028,c02b,c02c,c02f,c030_000a,000b,000d,0017,0023,002b,002d,0031,0033,ff01_0804,0805,0806,0401,0501,0201,0403,0503,0203,0202,0601,0603`
JA4_o (sample)	`t13d1012h2_8d8759d5f363_a5520a51e189`
JA4_ro (sample)	`t13d1012h2_1302,1301,c02c,c02b,c030,c02f,c024,c023,c028,c027_0000,002b,000d,0023,000a,000b,0010,0033,0031,0017,ff01,002d_0804,0805,0806,0401,0501,0201,0403,0503,0203,0202,0601,0603`

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
`ge20nn000000_000000000000_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: rust-hyper 1.11.1, rust-hyper 1.11.0, rust-hyper 1.12.0, +1 more.The fingerprint page shows the full measured match list. More on the catalog.	4
`ge20nn020000_fb4f949fd323_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.6, powershell 7.6.8.The fingerprint page shows the full measured match list. More on the catalog.	4

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`2:0;4:65535\|67043329\|0\|m,s,a,p` Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.6, powershell 7.6.8.The fingerprint page shows the full measured match list. More on the catalog.	8

TCP SYN (p0f)

fingerprint	co-occurrences
`4:110+18:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0`	4
`4:114+14:0:1440:65535,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0`	2
`4:110+18:0:1440:65535,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0`	1
`4:109+19:0:1440:65535,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`64240_2-1-3-1-1-4_1440_8`	4
`65535_2-1-3-1-1-4_1440_8`	4

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Windows NT 10.0; Microsoft Windows 10.0.26100; en-US) PowerShell/7.6.6`	2
`Mozilla/5.0 (Windows NT 10.0; Microsoft Windows 10.0.20348; en-US) PowerShell/7.6.6`	2

Country

fingerprint	co-occurrences
`US` · United States	8

Network (ASN)

fingerprint	co-occurrences
`AS8075` · Microsoft Corporation	8