ET MALWARE EVILNUM CnC Connectivity Check

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/tran/check.php?id=&ver="; depth:24; fast_pattern;
pcre:"/&ver=\d\.\d$/i";
http.accept;
content:"text/html, application/xhtml+xml, */*"; depth:37; endswith;
http.header_names;
content:!"Referer";
Raw source ET MALWARE EVILNUM CnC Connectivity Check · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE EVILNUM CnC Connectivity Check";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/tran/check.php?id=&ver="; depth:24; fast_pattern;
    pcre:"/&ver=\d\.\d$/i";
    http.accept;
    content:"text/html, application/xhtml+xml, */*"; depth:37; endswith;
    http.header_names;
    content:!"Referer";
    reference:url,blog.prevailion.com/2020/05/phantom-in-command-shell5.html;
    classtype:command-and-control;
    sid:2030124; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_05_07, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_05_07;
)

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