ET MALWARE Win32/Webdor.NAC Variant CnC Activity

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".html?m=";
content:"&c="; distance:0;
content:"&v="; distance:0;
content:"&myID=";
content:"/"; within:255;
content:"/"; within:10;
http.user_agent;
content:"Catalyst"; bsize:8; fast_pattern;
Raw source ET MALWARE Win32/Webdor.NAC 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/Webdor.NAC Variant CnC Activity";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".html?m=";
    content:"&c="; distance:0;
    content:"&v="; distance:0;
    content:"&myID=";
    content:"/"; within:255;
    content:"/"; within:10;
    http.user_agent;
    content:"Catalyst"; bsize:8; fast_pattern;
    reference:md5,1e2a28d5f4f03420df7a6766e0e4277c;
    classtype:trojan-activity;
    sid:2035456; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_03_15, deployment Perimeter, malware_family Win32_Webdor_NAC, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_15;
)

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