""ET TROJAN Win32/VBS Backdoor Sending System Information (POST)""

SID: 2044438

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2023_03_06, deployment Perimeter, deployment SSLDecrypt, signature_severity Major, updated_at 2023_03_06

Reference:

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: "/post/weathermap"

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

  • Value: "|7b 22|u|22 3a 22|" Depth: 6

  • Value: "|22 2c 22|com|22 3a 22|"

  • Value: "|22 2c 22|os|22 3a 22|"

  • Value: "|22 2c 22|mac|22 3a 5b 22|"

  • Value: "|22 5d 2c 22|fs|22 3a 5b|"

  • Value: !"Referer|3a 20|"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_header

  • http_client_body

  • http_client_body

  • http_client_body

  • http_client_body

  • http_client_body

  • http_header

source