""ET TROJAN Powershell Octopus Backdoor Sending System Information (POST)""

SID: 2034935

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_01_18, deployment Perimeter, signature_severity Major, updated_at 2022_01_18

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 /proxy HTTP/1.1"

  • Value: !"Referer"

  • Value: "NewFolderName=" Depth: 14

Within:

PCRE: "/**\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}**/R"

Special Options:

  • fast_pattern

  • http_header

  • http_client_body

source