""ET TROJAN Possible PHP.MAILER WebShell Register Shutdown Function Request Inbound""

SID: 2027970

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Server, created_at 2019_09_09, deployment Perimeter, performance_impact Low, signature_severity Major, updated_at 2019_09_09

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: any

Destination Network: any

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: ".php"

  • Value: "r=register_shutdown_function" Depth: 28

  • Value: "&d="

  • Value: "&s="

  • Value: "&c="

Within:

PCRE: "/.php$/U"

Special Options:

  • http_method

  • http_uri

  • http_client_body

  • http_client_body

  • http_client_body

  • http_client_body

source