ET MALWARE CommentCrew Possible APT c2 communications get command client key

Query · suricata

flow:established,to_client;
content:"Y29tbWFuZD1HZXRDb21tYW5kO2NsaWVudGtleT";
content:"O2hvc3RuYW1lPW";
Raw source ET MALWARE CommentCrew Possible APT c2 communications get command client key · 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 get command client key";
    flow:established,to_client;
    content:"Y29tbWFuZD1HZXRDb21tYW5kO2NsaWVudGtleT";
    content:"O2hvc3RuYW1lPW";
    classtype:targeted-activity;
    sid:2016488; rev:5;
    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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