""ET TROJAN Mermaid Ransomware Variant CnC Activity M1""

SID: 2029234

Revision: 4

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_01_07, deployment Perimeter, signature_severity Major, tag Ransomware, updated_at 2020_01_24, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

  • md5

  • b3bc3fe63fad42ae8bcd448b8aec3e3e

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "GET"

  • Value: "=ID:__"

  • Value: "Key1|3a|"

  • Value: "Key2|3a|"

  • Value: "User-Agent|3a 20|Mozilla/3.0 (compatible|3b 20|Indy Library)|0d 0a|"

  • Value: !"Referer|3a|"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • http_uri

  • http_uri

  • fast_pattern

  • http_header

  • http_header

source