ET MALWARE Infostealer.Mysayad Checkin 1

Query · suricata

flow:established,to_server;
urilen:17;
http.method;
content:"HEAD";
http.uri;
content:"/GlobalUpdate.upt"; fast_pattern;
http.header_names;
content:!"Referer";
content:!"User-Agent|0d 0a|";
Raw source ET MALWARE Infostealer.Mysayad Checkin 1 · 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 Infostealer.Mysayad Checkin 1";
    flow:established,to_server;
    urilen:17;
    http.method;
    content:"HEAD";
    http.uri;
    content:"/GlobalUpdate.upt"; fast_pattern;
    http.header_names;
    content:!"Referer";
    content:!"User-Agent|0d 0a|";
    reference:md5,799600122930bbc64b7dac987ea8bb39;
    reference:url,vinsula.com/2014/07/20/sayad-flying-kitten-infostealer-malware/;
    classtype:command-and-control;
    sid:2018889; rev:4;
    metadata:created_at 2014_08_04, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_25;
)

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