ET MALWARE IsSpace/Zacom Connectivity Check

Query · suricata

flow:established,to_server;
urilen:1;
http.method;
content:"GET";
http.host;
content:"www.microsoft.com"; bsize:17;
http.user_agent;
content:"Mozilla/5.0 (compatible|3b 20|MSIE 7.0|3b|Windows NT 5.1)"; fast_pattern;
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET MALWARE IsSpace/Zacom 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 IsSpace/Zacom Connectivity Check";
    flow:established,to_server;
    urilen:1;
    http.method;
    content:"GET";
    http.host;
    content:"www.microsoft.com"; bsize:17;
    http.user_agent;
    content:"Mozilla/5.0 (compatible|3b 20|MSIE 7.0|3b|Windows NT 5.1)"; fast_pattern;
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:md5,25631f5ccec8f155a8760b8568ca22c5;
    classtype:trojan-activity;
    sid:2021215; rev:3;
    metadata:created_at 2015_06_09, signature_severity Major, updated_at 2020_05_22;
)

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