ET MALWARE Bifrose/Cycbot Checkin

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"?sv="; fast_pattern;
content:"&tq=";
pcre:"/(?:1|2)\.(?:p(?:hp|ng)|jpe?g|cgi|gif)\?sv=\d{2,3}&tq=/i";
http.user_agent;
content:"chrome/9.0"; depth:10;
Raw source ET MALWARE Bifrose/Cycbot Checkin · 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 Bifrose/Cycbot Checkin";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"?sv="; fast_pattern;
    content:"&tq=";
    pcre:"/(?:1|2)\.(?:p(?:hp|ng)|jpe?g|cgi|gif)\?sv=\d{2,3}&tq=/i";
    http.user_agent;
    content:"chrome/9.0"; depth:10;
    classtype:command-and-control;
    sid:2013795; rev:11;
    metadata:created_at 2011_10_24, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_14;
)

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