""ET TROJAN Win32/BlackRain CnC Activity""

SID: 2049802

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_12_20, deployment Perimeter, confidence High, signature_severity Critical, updated_at 2023_12_20

Reference:

  • md5

  • 7c711ea527dece150c377ba6ea303173

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: "action=" Depth: 7

  • Value: "&botID="

  • Value: !"Referer|3a 20|"

Within:

PCRE: "/&botID=(?:[a-z0-9]{40})$/P"

Special Options:

  • http_method

  • http_client_body

  • http_client_body

  • fast_pattern

  • http_header

source