ET MALWARE Fodcha Botnet Style DNS Server Lookup

Query · suricata

flow:established,to_server;
http.request_line;
content:"GET /geoip/?res=10&r HTTP/1.1"; fast_pattern;
http.header_names;
content:"|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; bsize:22;
http.host;
content:"1.1.1.1";
target:src_ip;
Raw source ET MALWARE Fodcha Botnet Style DNS Server Lookup · 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 Fodcha Botnet Style DNS Server Lookup";
    flow:established,to_server;
    http.request_line;
    content:"GET /geoip/?res=10&r HTTP/1.1"; fast_pattern;
    http.header_names;
    content:"|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; bsize:22;
    http.host;
    content:"1.1.1.1";
    reference:url,blog.netlab.360.com/fodcha-is-coming-back-with-rddos/;
    classtype:trojan-activity;
    sid:2039783; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_11_15, deployment Perimeter, malware_family Fodcha, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_11_15;
    target:src_ip;
)

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