ET MALWARE MSIL/Heracles Variant CnC Activity

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.user_agent;
content:"cwyuno1c7n82bc201et81t627c8e6912r";
http.header_names;
content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; bsize:22;
threshold:type limit, track by_src, count 1, seconds 120;
Raw source ET MALWARE MSIL/Heracles Variant CnC Activity · 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 $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE MSIL/Heracles Variant CnC Activity";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.user_agent;
    content:"cwyuno1c7n82bc201et81t627c8e6912r";
    http.header_names;
    content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; bsize:22;
    threshold:type limit, track by_src, count 1, seconds 120;
    reference:md5,e0c6208936aa0cccd6867214145433b3;
    reference:url,tria.ge/210728-48w5bjla3x;
    classtype:command-and-control;
    sid:2033592; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_07_28, deployment Perimeter, deployment SSLDecrypt, malware_family MSIL_Heracles, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_07_28;
)

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