""ET CURRENT_EVENTS Possible Phishing Landing Obfuscation 2016-03-17""

SID: 2027899

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2016_03_18, deployment Perimeter, signature_severity Critical, tag Phishing, updated_at 2016_07_18, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: established,to_client

Contents:

  • Value: "200"

  • Value: "Content-Type|3a 20|text/html"

  • Value: "<meta http-equiv="

  • Value: "refresh"

  • Value: "content="

  • Value: "URL=data|3a|text/html|3b|base64,"

Within: 30

PCRE:

Special Options:

  • http_stat_code

  • http_header

  • file_data

  • nocase

  • nocase

  • nocase

  • fast_pattern

  • nocase

source