""ET WEB_SERVER Generic Webshell Accessed on Internal Compromised Server""

SID: 2032635

Revision: 2

Class Type: web-application-attack

Metadata: affected_product Web_Server_Applications, attack_target Web_Server, created_at 2021_04_09, deployment Perimeter, signature_severity Major, updated_at 2021_04_09

Reference:

Protocol: tcp

Source Network: $HTTP_SERVERS

Source Port: $HTTP_PORTS

Destination Network: $EXTERNAL_NET

Destination Port: any

Flow: established,to_client

Contents:

  • Value: "

    Linux|20|"

  • Value: "method=|22|post|22 20|enctype=|22|multipart/form-data|22 20|name=|22|uploader|22 20|id=|22|uploader|22|><input type=|22|file|22 20|name=|22|file|22 20|size="

  • Value: ""

Within:

PCRE:

Special Options:

  • file_data

  • fast_pattern

source