ET MALWARE Malicious Dropper Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/dwn/"; startswith; fast_pattern;
http.host;
pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/";
http.header_names;
content:!"Referer";
Raw source ET MALWARE Malicious Dropper Activity (GET) · 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 8000: (
    msg:"ET MALWARE Malicious Dropper Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/dwn/"; startswith; fast_pattern;
    http.host;
    pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/";
    http.header_names;
    content:!"Referer";
    reference:md5,0e0c65c206e1244987db350f3fefabd6;
    reference:md5,e31b4fb81764e4dd6bacab9baba266b4;
    reference:url,www.recordedfuture.com/chinese-group-tag-22-targets-nepal-philippines-taiwan/;
    classtype:trojan-activity;
    sid:2033289; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_07_09, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_07_09;
)

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