""ET TROJAN Win32/Sinresby.B Downloader CnC Activity M1""

SID: 2033792

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_08_25, deployment Perimeter, performance_impact Low, signature_severity Major, updated_at 2021_08_25

Reference:

  • md5

  • 8049009d9675d5ac345ce96d1a7c9e67

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "/?c=Public&a=get_config"

  • Value: "POST /?c=Public&a=get_config" Depth: 28

  • Value: "/?c=Public&a=get_config|0d 0a|"

Within:

PCRE: "/^Referer\x3a\x20[^\r\n]+\/\?c=Public&a=get_config/Hmi"

Special Options:

  • http_header

  • fast_pattern

  • http_header

source