""ET TROJAN Win32/CryPy Ransomware CnC Checkin""

SID: 2023345

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 2016_09_09, deployment Perimeter, malware_family Ransomware, signature_severity Major, tag Ransomware, updated_at 2016_10_18, 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: "/victim.php?info="

  • Value: "&ip="

  • Value: "User-Agent|3a 20|Python-urllib"

  • Value: !"Accept"

  • Value: !"Referer|3a|"

Within:

PCRE: "/\/victim.php\?info=(?:[A-Za-z0-9+/]{4})(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})&ip=(?:[A-Za-z0-9+/]{4})(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/Ui"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_uri

  • http_header

  • http_header

  • http_header

source