""ET INFO Possible ELF executable sent when remote host claims to send a Text File""

SID: 2032973

Revision: 1

Class Type: bad-unknown

Metadata: affected_product Linux, attack_target Client_Endpoint, created_at 2021_05_18, deployment Perimeter, signature_severity Informational, updated_at 2021_05_18

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: established,from_server

Contents:

  • Value: "Content-Type|3a 20|text/plain"

  • Value: "|7f 45 4c 46|" Depth: 4

Within:

PCRE:

Special Options:

  • http_header

  • file_data

  • fast_pattern

source