ET MALWARE Ousaban Related Maldoc Activity

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/ZP/MIKV.php"; bsize:12; fast_pattern;
http.user_agent;
content:"Embarcadero|20|URI|20|Client/1.0"; bsize:26;
http.header_names;
content:!"Referer";
content:!"Accept";
Raw source ET MALWARE Ousaban Related Maldoc 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 Ousaban Related Maldoc Activity";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/ZP/MIKV.php"; bsize:12; fast_pattern;
    http.user_agent;
    content:"Embarcadero|20|URI|20|Client/1.0"; bsize:26;
    http.header_names;
    content:!"Referer";
    content:!"Accept";
    reference:url,twitter.com/ESETresearch/status/1376490532445294594;
    reference:md5,ad8fd5461bec26b97cdfc0b05028bfc0;
    reference:md5,1e4b45e2ab5c679f9e983da1c135ab5e;
    reference:md5,34db9c98f3149d98bf0a562ce2ef5344;
    classtype:trojan-activity;
    sid:2032356; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_03_31, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_03_31;
)

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