""ET INFO Observed Initial New Kind of Network (NKN) POST Request""

SID: 2034414

Revision: 3

Class Type: misc-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_11_10, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Web3, updated_at 2023_05_02

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: 30003

Flow: established,to_server

Contents:

  • Value: "User-Agent|3a 20|Go-http-client/"

  • Value: "Host|3a 20|seed.nkn.org|3a|"

  • Value: "{|22|id|22 3a 22|"

  • Value: "POST|20|/|20|HTTP/1.1"

Within:

PCRE:

Special Options:

  • http_header

  • fast_pattern

  • http_header

  • http_client_body

source