ET MALWARE Malicious Loader Related Activity (GET)

Query · suricata

flow:established,to_server;
flowbits:set,ET.misc.loader;
flowbits:noalert;
http.method;
content:"GET";
http.uri;
content:".html"; endswith;
http.user_agent;
content:"|3b 20|WinHttp.WinHttpRequest.5|29|"; fast_pattern;
http.header_names;
content:!"Referer";
target:src_ip;

Rule dependencies

Feeds into

  • 1 rule read ET.misc.loader · view all
Raw source ET MALWARE Malicious Loader Related 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 any (
    msg:"ET MALWARE Malicious Loader Related Activity (GET)";
    flow:established,to_server;
    flowbits:set,ET.misc.loader;
    flowbits:noalert;
    http.method;
    content:"GET";
    http.uri;
    content:".html"; endswith;
    http.user_agent;
    content:"|3b 20|WinHttp.WinHttpRequest.5|29|"; fast_pattern;
    http.header_names;
    content:!"Referer";
    reference:md5,e788e3c27518515d09b5dee9f60acb49;
    classtype:trojan-activity;
    sid:2049799; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_12_20, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_20;
    target:src_ip;
)

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