""ET TROJAN Suspected Lockscreen Ransomware Activity""

SID: 2030665

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2020_08_07, deployment Perimeter, signature_severity Major, tag Ransomware, updated_at 2020_08_07, 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: "POST"

  • Value: "&page_title=Windows Security Warning&"

Within: 100

PCRE: "/Referer[^\r\n]+\/\?page_id=93/H"

Special Options:

  • http_method

  • fast_pattern

  • http_client_body

source