""ET TROJAN Win32/CryptFile2 Ransomware Checkin M2""

SID: 2023397

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 2016_10_24, deployment Perimeter, malware_family Ransomware, malware_family CryptFile2, signature_severity Major, tag Ransomware, updated_at 2016_10_24, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

  • md5

  • 5bb7d85f7a5f1d2b01efabe5635e2992

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: ".php"

  • Value: "User-Agent|3a 20 70 6f 73 74 5f 65 78 61 6d 70 6c 65|"

  • Value: "=0x"

  • Value: "|2c|0x"

  • Value: "|3c 62 72 3e|"

Within: 5

PCRE: "/.php$/U"

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_client_body

  • http_client_body

  • http_client_body

source