""ET TROJAN W32/Patchwork.Backdoor Communicating with CnC""

SID: 2025163

Revision: 3

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_12_21, deployment Perimeter, signature_severity Major, updated_at 2018_05_11

Reference:

  • md5

  • ddeabe234c4084ba379cf3be4fdf503d

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: ".php?cx="

  • Value: "&b="

  • Value: "&gt="

  • Value: "&tx="

  • Value: "|0d 0a|Content-Length|3a 20|0|0d 0a|"

Within:

PCRE: "/.php\?cx=[A-F0-9]+&b=[A-F0-9]+&gt=[A-F0-9]+&tx=[A-F0-9]+$/Ui"

Special Options:

  • http_method

  • http_uri

  • nocase

  • fast_pattern

  • http_uri

  • nocase

  • http_uri

  • nocase

  • http_uri

  • nocase

  • http_header

source