ET MALWARE Medfos Connectivity Check

Query · suricata

flow:established,to_server;
http.uri;
content:"/uploading/id="; fast_pattern;
http.uri.raw;
pcre:"/^\/uploading\/id=\d{2,20}&u=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/";
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET MALWARE Medfos Connectivity Check · Suricata
Esc
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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Medfos Connectivity Check";
    flow:established,to_server;
    http.uri;
    content:"/uploading/id="; fast_pattern;
    http.uri.raw;
    pcre:"/^\/uploading\/id=\d{2,20}&u=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/";
    http.header_names;
    content:!"Referer|0d 0a|";
    classtype:misc-activity;
    sid:2016800; rev:8;
    metadata:created_at 2013_05_01, signature_severity Major, updated_at 2020_09_18;
)

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