""ET INFO Terse Request for .txt - Likely Hostile""

SID: 2034581

Revision: 1

Class Type: bad-unknown

Metadata: attack_target Client_Endpoint, created_at 2021_12_03, deployment Perimeter, signature_severity Informational, updated_at 2021_12_03

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "GET"

  • Value: ".txt"

  • Value: !"Referer|3a 20|"

Within:

PCRE: "/.txt$/U"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_header

source