""ET TROJAN Suspected Kimsuky Activity (POST)""

SID: 2046617

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2023_06_22, deployment Perimeter, performance_impact Moderate, confidence Medium, signature_severity Major, updated_at 2023_06_22

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: ".php"

  • Value: !"Linux"

  • Value: !"Android"

  • Value: "page=" Depth: 5

  • Value: !"Referer|3a 20|"

Within:

PCRE: "/page=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/P"

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_header

  • http_client_body

  • fast_pattern

  • http_header

source