ET WEB_CLIENT JS Browser Based Ransomware

Query · suricata

flow:established,from_server;
file_data;
content:"YOUR BROWSER HAS BEEN LOCKED.|5c|n|5c|nALL PC DATA WILL BE DETAINED";
Raw source ET WEB_CLIENT JS Browser Based Ransomware · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET WEB_CLIENT JS Browser Based Ransomware";
    flow:established,from_server;
    file_data;
    content:"YOUR BROWSER HAS BEEN LOCKED.|5c|n|5c|nALL PC DATA WILL BE DETAINED";
    reference:url,blog.malwarebytes.org/intelligence/2013/07/fbi-ransomware-now-targeting-apples-mac-os-x-users/;
    reference:url,www.f-secure.com/weblog/archives/00002577.html;
    classtype:trojan-activity;
    sid:2017165; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2013_07_19, deployment Perimeter, signature_severity Major, tag Ransomware, updated_at 2019_07_26, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;
)

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