ET MALWARE Win32/Fujacks Variant CnC Activity

Query · suricata

flow:established,to_server;
http.start;
content:"GET /down1.txt HTTP/1.1|0d 0a|User-Agent|3a 20|ErrCode|0d 0a|Host|3a 20|"; startswith;
http.header_names;
content:!"|0d 0a|Referer|0d 0a|";
content:!"|0d 0a|Connection|0d 0a|";
content:!"|0d 0a|Accept|0d 0a|";
Raw source ET MALWARE Win32/Fujacks Variant CnC Activity · 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 Win32/Fujacks Variant CnC Activity";
    flow:established,to_server;
    http.start;
    content:"GET /down1.txt HTTP/1.1|0d 0a|User-Agent|3a 20|ErrCode|0d 0a|Host|3a 20|"; startswith;
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|";
    content:!"|0d 0a|Connection|0d 0a|";
    content:!"|0d 0a|Accept|0d 0a|";
    reference:md5,54b72be155b057f693508c0d15fc6d00;
    classtype:command-and-control;
    sid:2030580; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_07_22, deployment Perimeter, malware_family Win32_Fujacks, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_07_22;
)

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