""ET INFO HTTP POST to XYZ TLD Containing Pass - Possible Phishing""

SID: 2031189

Revision: 3

Class Type: misc-activity

Metadata: affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2020_11_09, deployment Perimeter, signature_severity Critical, tag Phishing, updated_at 2020_11_12, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing

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: ".xyz|0d 0a|"

  • Value: "pass"

Within:

PCRE: "/^Host\x3a\x20[^\r\n]+.xyz$/Hm"

Special Options:

  • http_method

  • http_header

  • http_client_body

  • nocase

source