""ET TROJAN Generic VBS Backdoor Sending Windows Information (POST)""

SID: 2049002

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2023_10_31, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Critical, updated_at 2023_10_31, reviewed_at 2023_10_31

Reference:

  • md5

  • 182fdcc1c5510b28eaadf9c0ce207932

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: "/api/alert"

  • Value: "|7b 22|comp|22 3a 20 22|" Depth: 10

  • Value: "|22 2c 22|user|22 3a 20|"

  • Value: "|22 2c 22|version|22 3a 20|"

  • Value: "|22 2c 22|arch|22 3a 20|"

  • Value: "|22 2c 22|caption|22 3a 20|"

  • Value: "Windows"

  • Value: "User-Agent|3a 20|Mozilla/4.0 (compatible|3b 20|Win32|3b 20|WinHttp.WinHttpRequest.5)|0d 0a|"

  • Value: !"Referer"

Within:

PCRE:

Special Options:

  • http_method

  • fast_pattern

  • http_uri

  • http_client_body

  • http_client_body

  • http_client_body

  • http_client_body

  • http_client_body

  • http_client_body

  • http_header

  • http_header

source