""ET TROJAN GoBrut/StealthWorker Service Bruter CnC Checkin""

SID: 2033719

Revision: 3

Class Type: trojan-activity

Metadata: affected_product Linux, attack_target Client_Endpoint, created_at 2019_05_22, deployment Perimeter, performance_impact Low, signature_severity Major, updated_at 2019_08_13

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: "/knock?worker="

  • Value: "&os="

  • Value: "&version="

  • Value: "User-Agent|3a 20|Mozilla/5.0 (X11|3b 20|Ubuntu|3b 20|Linux x"

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

  • Value: !"Referer|3a|"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_uri

  • http_uri

  • http_header

  • http_header

  • http_header

source