""ET TROJAN Octopus Malware CnC Activity""

SID: 2026544

Revision: 3

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_10_24, deployment Perimeter, signature_severity Major, tag Octopus, updated_at 2022_05_03

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?query="

  • Value: "eyJpZCI6"

  • Value: "Accept|3a 20|text/html,application/xhtml+xml,application/xml|3b|q=0.9,/|3b|q=0.8|0d 0a|"

  • Value: "Content-Type|3a 20|multipart/form-data|3b|"

Within:

PCRE: "/^\/[a-z].php\?query=[a-f0-9]{32}$/Ui"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_client_body

  • http_header

  • http_header

source