""ET CURRENT_EVENTS Tech Support Scam - Windows Firewall M2 2021-08-17""

SID: 2034204

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: "|20|firewall0x"

• Value: "src=|22|virus-scan.png|22|"

• Value: "Scan|20|quickly"

Within:

PCRE:

Special Options:

• http_stat_code

• file_data

• fast_pattern

source