""ET TROJAN [ANY.RUN] RCRU64 Ransomware Variant CnC Activity""

SID: 2045821

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_05_23, deployment Perimeter, malware_family RUCU64, performance_impact Low, confidence High, signature_severity Critical, tag Ransomware, updated_at 2023_06_23, 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: "GET"

  • Value: "_And_Netword_Drive_Size|3a|"

  • Value: "_Encryption_Mode"

  • Value: !"User-Agent|3a 20|"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_uri

  • http_header

source