ET MALWARE Win32/Frosparf.B Downloading Hosts File

Query · suricata

flow:established,from_server;
file_data;
content:"9.9.9.9 "; within:8;
pcre:"/^(?:[a-zA-Z0-9\x2d\x5f]{1,63}\.)+?[a-zA-Z0-9\x2d\x5f]{1,63}[\r\n]*?9\.9\.9\.9\s+?(?:[a-zA-Z0-9\_\-]{1,63}\.)+?[a-zA-Z0-9\x2d\x5f]{1,63}[\r\n]/R";
Raw source ET MALWARE Win32/Frosparf.B Downloading Hosts File · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE Win32/Frosparf.B Downloading Hosts File";
    flow:established,from_server;
    file_data;
    content:"9.9.9.9 "; within:8;
    pcre:"/^(?:[a-zA-Z0-9\x2d\x5f]{1,63}\.)+?[a-zA-Z0-9\x2d\x5f]{1,63}[\r\n]*?9\.9\.9\.9\s+?(?:[a-zA-Z0-9\_\-]{1,63}\.)+?[a-zA-Z0-9\x2d\x5f]{1,63}[\r\n]/R";
    reference:md5,4ad55877464aa92e49231d913d00eb69;
    classtype:trojan-activity;
    sid:2019142; rev:2;
    metadata:created_at 2014_09_09, malware_family Win32_Frosparf_B, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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