ET MALWARE CommentCrew Possible APT c2 communications sleep3

Query · suricata

flow:established,to_client;
file_data;
content:"<!--czoxMzc=--!>";
Raw source ET MALWARE CommentCrew Possible APT c2 communications sleep3 · 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 $EXTERNAL_NET 80 -> $HOME_NET any (
    msg:"ET MALWARE CommentCrew Possible APT c2 communications sleep3";
    flow:established,to_client;
    file_data;
    content:"<!--czoxMzc=--!>";
    classtype:targeted-activity;
    sid:2016480; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2013_02_22, deployment Perimeter, confidence Medium, signature_severity Major, tag c2, updated_at 2019_07_26, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
)

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