""ET TROJAN Potao CnC POST Response""

SID: 2021555

Revision: 1

Class Type: trojan-activity

Metadata: created_at 2015_07_31, updated_at 2015_07_31

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: to_client,established

Contents:

  • Value: "Server|3a 20|nginx"

  • Value: "<?xml version=|27|1.0|27|?>" Depth: 21

  • Value: ""

  • Value: "|0a|"

  • Value: ""

Within:

PCRE: "/^\x0a(?:[A-Za-z0-9/+]{4})*(?:[A-Za-z0-9/+]{2}==|[A-Za-z0-9/+]{3}=|[A-Za-z0-9/+]{4})\x0a/R"

Special Options:

  • http_header

  • file_data

  • fast_pattern

source