ET MALWARE Zeus Bot GET to Bing checking Internet connectivity

Query · suricata

flow:established,to_server;
http.header;
content:"|3a 20|no-cache";
http.host;
content:"www.bing.com"; depth:12; endswith;
http.start;
content:"GET / HTTP/1.1|0d 0a|Accept|3a 20|*/*|0d 0a|Connection|3a 20|Close|0d 0a|User-Agent|3a 20|"; depth:60;
http.header_names;
content:!"Referer";
Raw source ET MALWARE Zeus Bot GET to Bing checking Internet connectivity · 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 Zeus Bot GET to Bing checking Internet connectivity";
    flow:established,to_server;
    http.header;
    content:"|3a 20|no-cache";
    http.host;
    content:"www.bing.com"; depth:12; endswith;
    http.start;
    content:"GET / HTTP/1.1|0d 0a|Accept|3a 20|*/*|0d 0a|Connection|3a 20|Close|0d 0a|User-Agent|3a 20|"; depth:60;
    http.header_names;
    content:!"Referer";
    reference:url,www.secureworks.com/research/threats/zeus/?threat=zeus;
    reference:url,lists.emergingthreats.net/pipermail/emerging-sigs/2010-October/009807.html;
    classtype:command-and-control;
    sid:2013488; rev:5;
    metadata:created_at 2011_08_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_28;
)

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