ET MALWARE Black KingDom Ransomware Related Activity

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/vpn-service/"; startswith;
content:"crunchyroll-vpn"; endswith; fast_pattern;
pcre:"/^\/vpn-service\/[a-z]{15}\/crunchyroll-vpn$/";
Raw source ET MALWARE Black KingDom Ransomware Related Activity · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Black KingDom Ransomware Related Activity";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/vpn-service/"; startswith;
    content:"crunchyroll-vpn"; endswith; fast_pattern;
    pcre:"/^\/vpn-service\/[a-z]{15}\/crunchyroll-vpn$/";
    reference:url,news.sophos.com/en-us/2021/03/23/black-kingdom/;
    classtype:trojan-activity;
    sid:2032331; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2021_03_25, deployment Perimeter, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_03_25, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;
)

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