""ET CURRENT_EVENTS Tech Support Scam - Windows Firewall M4 2021-08-17""

SID: 2034206

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2021_10_17, deployment Perimeter, signature_severity Minor, tag SocEng, updated_at 2021_10_17, 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,from_server

Contents:

  • Value: "200"

  • Value: "i>|20|Looking|20|for|20|updates<"

  • Value: "i>|20|Scan|20|memory<"

  • Value: "Windows|20|registry|20|scan"

Within:

PCRE:

Special Options:

  • http_stat_code

  • file_data

  • fast_pattern

source