""ET WEB_CLIENT Tech Support Phone Scam Landing M1 Jan 20 2017""

SID: 2023751

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2017_01_20, deployment Perimeter, signature_severity Major, tag Phishing, updated_at 2017_01_20

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: from_server,established

Contents:

  • Value: "401"

  • Value: "WWW-Authenticate|3a 20|Basic realm=|22|"

  • Value: "Warning|3a|"

  • Value: "Call Microsoft"

Within:

PCRE:

Special Options:

  • http_stat_code

  • nocase

  • http_header

  • nocase

  • http_header

  • fast_pattern

  • http_header

  • nocase

source