Akin HTTP request fingerprint
b11cun052_40040001_96308994_x9f62fdb1
Seen 2026-02-19 to 2026-09-29 across the retained window.
The feed is a URL your firewall, MISP or SIEM polls; it needs a free account so it can be revoked. Or watch the top network: AS41608 sends an email when it next hits a sensor.
7
Source IPs
2
Networks
3
Countries
4
Ports hit
16
Events
4
IPs / network
Top networks
Countries
Ports targeted
What it requests
Fingerprint family: 5 shapes, 85 IPs, 2.5K events in 30 days
Every shape here is within one request header of the family's largest shape and comes from the same source addresses. One tool, several request shapes; a hashed fingerprint shows these as unrelated.
HTTP/1.1, 6 headers, no body, 2 outside the core list: connection, user-agent, host, upgrade, sec-websocket-key, sec-websocket-version
Related fingerprints
Clients whose header set is within two of this one, measured from the tokens themselves.
About this fingerprint
Akin fingerprints an HTTP client from the request head alone: the protocol version, line endings, body framing, which headers are present, and the grammar of the negotiation header values. The User-Agent string and the request path are deliberately excluded, because both are trivially changed and both were measured varying within a single operator, so a scanner that rotates either keeps one fingerprint. The middle section is a presence bitmap rather than a hash, so two tokens can be compared directly to see how many headers the clients differ by.