""ET TROJAN Possible Ransomware HTTP POST to Onion Link Domain""

SID: 2032219

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_03_19, deployment Perimeter, signature_severity Major, tag Ransomware, updated_at 2021_03_19, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

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: ".onion.link|0d 0a|"

  • Value: "data="

Within:

PCRE: "/^Host\x3a\x20[^\r\n]+.onion.link/Hmi"

Special Options:

  • http_method

  • fast_pattern

  • http_header

  • http_client_body

source