ET MALWARE Suspected DonotGroup Dropper Activity

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/@/"; startswith;
content:"/tele.txt"; fast_pattern;
http.host;
content:"microsoft-updates.servehttp.com"; bsize:31;
Raw source ET MALWARE Suspected DonotGroup Dropper 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 Suspected DonotGroup Dropper Activity";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/@/"; startswith;
    content:"/tele.txt"; fast_pattern;
    http.host;
    content:"microsoft-updates.servehttp.com"; bsize:31;
    reference:md5,f23dd9acbf28f324b290b970fbc40b30;
    classtype:trojan-activity;
    sid:2033363; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_07_20, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_07_20;
)

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