""ET TROJAN CryptoShield Ransomware Checkin""

SID: 2023814

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 2017_01_31, deployment Perimeter, malware_family Ransomware, signature_severity Major, tag Ransomware, updated_at 2017_02_16, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

  • md5

  • ef815146b802cfd6a5fb67d1f9267745

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: "Content-Type|3a 20|application/x-www-form-urlencoded|0d 0a|"

  • Value: !"Referer|3a 20|"

  • Value: !"User-Agent|3a 20|"

  • Value: !"Accept"

  • Value: "id=" Depth: 3

  • Value: "&numbers=-----"

  • Value: "BEGIN|20|PRIVATE|20|KEY"

Within:

PCRE:

Special Options:

  • http_method

  • http_header

  • http_header

  • http_header

  • http_header

  • http_client_body

  • http_client_body

  • http_client_body

  • fast_pattern

source