""ET TROJAN Golang/Sandcat Plugin Activity (POST)""

SID: 2043217

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2023_01_05, deployment Perimeter, signature_severity Major, updated_at 2023_01_05

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: "/beacon"

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

  • Value: "eyJ" Depth: 3

  • Value: "Accept-Encoding|3a 20|gzip|0d 0a|"

  • Value: !"Referer|3a 20|"

Within:

PCRE: "/^(?:[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_client_body

  • fast_pattern

  • http_header

  • http_header

source