""ET TROJAN Bitter APT ZxxZ Downloader CnC Checkin""

SID: 2037718

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_07_07, deployment Perimeter, malware_family ZxxZLoader, performance_impact Low, signature_severity Major, updated_at 2022_07_07

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "GET"

  • Value: "profiles.php?profiles="

  • Value: !"Referer"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_header

source