""ET TROJAN Lyceum Golang HTTP Backdoor Requesting Commands""

SID: 2035959

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_04_14, deployment Perimeter, signature_severity Major, tag Backdoor, updated_at 2022_04_18

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: "auth_token=|22|XXXXXXX|22|"

  • Value: "Go-http-client/"

  • Value: "news="

  • Value: "&request_for_read="

Within:

PCRE: "/^User-Agent\x3a\x20[^\r\n]+Go-http-client\//Hmi"

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_header

  • http_client_body

  • fast_pattern

  • http_client_body

source