""ET TROJAN Backdoor.Elise CnC Beacon 3 M2""

SID: 2021278

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2015_06_16, deployment Perimeter, signature_severity Major, tag c2, updated_at 2015_06_19, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: to_server,established

Contents:

  • Value: "GET"

  • Value: ".html"

  • Value: !"Referer|3a|"

  • Value: "XX="

  • Value: "BX="

  • Value: "Cookie|3a 20|XX="

Within:

PCRE: "/\/\d{8,10}.html$/Ui"

Special Options:

  • http_method

  • nocase

  • http_uri

  • http_header

  • http_cookie

  • http_cookie

source