ET MALWARE CommentCrew Possible APT c2 communications get system

Query · suricata

flow:established,to_client;
content:"Y29tbWFuZD1nZXRzeXN0ZW07";
Raw source ET MALWARE CommentCrew Possible APT c2 communications get system · 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 tcp $EXTERNAL_NET 80 -> $HOME_NET any (
    msg:"ET MALWARE CommentCrew Possible APT c2 communications get system";
    flow:established,to_client;
    content:"Y29tbWFuZD1nZXRzeXN0ZW07";
    classtype:targeted-activity;
    sid:2016476; 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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