ET MALWARE UAC-0114/Winter Vivern File Exfilration

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".php"; endswith;
http.request_body;
content:"C:|5c|Users|5c|"; startswith; fast_pattern;
content:"|5c|"; within:270;
content:"|5c|"; within:50;
content:"|2e|"; within:300;
content:"###"; within:9;
target:src_ip;
Raw source ET MALWARE UAC-0114/Winter Vivern File Exfilration · 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 File Exfilration";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php"; endswith;
    http.request_body;
    content:"C:|5c|Users|5c|"; startswith; fast_pattern;
    content:"|5c|"; within:270;
    content:"|5c|"; within:50;
    content:"|2e|"; within:300;
    content:"###"; within:9;
    reference:url,cert.gov.ua/article/3761104;
    reference:md5,4e2acf4f8a396486ab4268c94a6a245f;
    reference:url,joesandbox.com/analysis/794564/0/html;
    classtype:command-and-control;
    sid:2044063; 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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