""ET INFO Empty POST with Terse Headers Over Non Standard Port""

SID: 2036225

Revision: 2

Class Type: bad-unknown

Metadata: attack_target Client_Endpoint, created_at 2022_04_14, deployment Perimeter, performance_impact Moderate, signature_severity Major, updated_at 2022_04_15, reviewed_at 2023_09_01

Reference:

  • md5

  • 52a46f058ec6b726fe2829a590a15155

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: 1024:

Flow: established,to_server

Contents:

  • Value: "POST / HTTP/1.1"

  • Value: "Content-Length|3a 20|0|0d 0a|"

Within:

PCRE: "/Host[^\r\n]+\r\nContent-Length[^\r\n]+\r\n\r\n/"

Special Options:

source