TCP SYN (p0f)

4:112+16:0:1340:mtu*47,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-07-01 14:54 · last seen 2026-07-08 18:47 · JSON

Decomposed attributes

IP version4
Initial TTL112+16
Options length0
MSS1340
Window sizemtu*47
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
Quirksdf,id+,ecn
Payload class0

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.

TLS ClientHello (JA4)

fingerprintco-occurrences
t12d080700_0df93f53a2f9_2dae41c691ec3

HTTP request (JA4H)

fingerprintco-occurrences
he11nn030000_44b0325fbcb5_000000000000_0000000000002
ge11nn06en00_827c3ac6a18a_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
64860_2-1-3-1-1-4_1340_83

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 6.1; WOW64) SkypeUriPreview Preview/0.5 skype-url-preview@microsoft.com1

Country

fingerprintco-occurrences
US · United States3

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation3