""ET TROJAN BazaBackdoor Variant CnC Activity M4""

SID: 2031673

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2021_02_25, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, signature_severity Major, updated_at 2021_02_25, reviewed_at 2024_01_02

Reference:

  • md5

  • 8488d9be18308a7f4e83b7c39fc79d17

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: !"."

  • Value: !"?"

  • Value: !"="

  • Value: !"&"

  • Value: "Cookie|3a 20|group="

Within:

PCRE: "/^group=\d$/C"

Special Options:

  • http_method

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • fast_pattern

source