""ET TROJAN Go/Hack Browser Data Exfil Attempt""

SID: 2033899

Revision: 3

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2021_09_03, deployment Perimeter, performance_impact Moderate, signature_severity Major, updated_at 2023_04_04

Reference:

  • md5

  • 4a13256c1c9701146ad9ce6682b1a12e

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: ".php"

  • Value: "User-Agent|3a 20|Go-http-client/"

  • Value: "name|3d 22|file|22 3b 20|filename|3d 22|"

  • Value: "="

  • Value: "="

  • Value: "="

  • Value: "="

  • Value: ".json|22 0d 0a|"

  • Value: "Content-Type|3a 20|multipart/form-data|3b 20|boundary=|0d 0a|"

Within:

PCRE: "/^Content-Type|3a 20|multipart/form-data\x3b\x20boundary=[a-f0-9]{60}$/Hmi"

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_client_body

  • http_client_body

  • fast_pattern

  • http_client_body

  • http_client_body

  • http_client_body

  • http_client_body

  • http_header

source