""ET TROJAN Win32.Crypren/Zcrypt Ransomware Checkin""

SID: 2022897

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2016_06_14, deployment Perimeter, signature_severity Major, tag Ransomware, updated_at 2016_06_14, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

  • md5

  • 7efb738c2b04aacdd3354d590cb3df47

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: ".php?computerid="

  • Value: !"Referer|3a 20|"

Within:

PCRE: "/.php\?computerid=[a-fA-F0-9]{32}&(?:public|private)=\d$/U"

Special Options:

  • http_uri

  • http_header

source