ET MALWARE UAC-0114/Winter Vivern CnC Activity

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/usersfolders/S-1-5-21-"; fast_pattern;
target:src_ip;
Raw source ET MALWARE UAC-0114/Winter Vivern CnC 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 UAC-0114/Winter Vivern CnC Activity";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/usersfolders/S-1-5-21-"; fast_pattern;
    reference:url,cert.gov.ua/article/3761104;
    reference:md5,4e2acf4f8a396486ab4268c94a6a245f;
    reference:url,joesandbox.com/analysis/794564/0/html;
    classtype:command-and-control;
    sid:2044064; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_02_02, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_02;
    target:src_ip;
)

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