""ET TROJAN Malicious Chrome Extension Requesting Websocket""

SID: 2025220

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Any, attack_target Client_Endpoint, created_at 2018_01_18, deployment Perimeter, performance_impact Moderate, signature_severity Major, updated_at 2018_01_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: "GET"

  • Value: "Upgrade|3a 20|websocket|0d 0a|"

  • Value: "Origin|3a 20|chrome-extension|3a|//ppmibgfeefcglejjlpeihfdimbkfbbnm|0d 0a|"

  • Value: !"Referer|3a|"

Within:

PCRE:

Special Options:

  • http_method

  • http_header

  • http_header

  • http_header

source