""ET TROJAN Citadel Checkin""

SID: 2018598

Revision: 2

Class Type: trojan-activity

Metadata: created_at 2014_06_24, updated_at 2016_10_06

Reference:

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: "/file.php"

  • Value: "Content-Length|3a| 128|0d 0a|"

  • Value: !"Referer"

  • Value: "Accept|3a 20|/|0d 0a|User-Agent|3a 20|" Depth: 25

Within:

PCRE: "/^\/[A-Za-z0-9]+?\/file.php$/U"

Special Options:

  • http_method

  • http_uri

  • nocase

  • http_header

  • http_header

  • http_header

source