ET MALWARE lu0bot Loader HTTP Request

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/?";
pcre:"/^[a-f0-9]{5,12}&a=/R";
content:"&a=Mozilla/4.0|20|"; fast_pattern;
http.user_agent;
content:"Mozilla|2f|4|2e|0|20 28|compatible|3b 20|Win32|3b 20|WinHttp|2e|WinHttpRequest|2e|5|29|"; bsize:57;
Raw source ET MALWARE lu0bot Loader HTTP Request · 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 lu0bot Loader HTTP Request";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/?";
    pcre:"/^[a-f0-9]{5,12}&a=/R";
    content:"&a=Mozilla/4.0|20|"; fast_pattern;
    http.user_agent;
    content:"Mozilla|2f|4|2e|0|20 28|compatible|3b 20|Win32|3b 20|WinHttp|2e|WinHttpRequest|2e|5|29|"; bsize:57;
    reference:url,fumik0.com/2021/06/24/lu0bot-an-unknown-nodejs-malware-using-udp/;
    classtype:command-and-control;
    sid:2033176; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_06_24, deployment Perimeter, malware_family lu0bot, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_06_24;
)

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