ET MALWARE CommentCrew Possible APT c2 communications html return 1

Query · suricata

flow:established,to_client;
content:"|48 54 54 50 2f 31 2e 30 20 32 30 30 20 4f 4b 0d 0a|";
content:"|43 6f 6e 74 65 6e 74 2d 4c 65 6e 67 74 68 3a 20 31 0d 0a|";
content:"|43 6f 6e 65 63 74 69 6f 6e 3a 20 4b 65 65 70 2d 41 6c 69 76 65 0d 0a|";
content:"|53 65 74 2d 43 6f 6f 6b 69 65 3a|";
content:"|0d 0a 20 31|";
Raw source ET MALWARE CommentCrew Possible APT c2 communications html return 1 · Suricata
Esc
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 html return 1";
    flow:established,to_client;
    content:"|48 54 54 50 2f 31 2e 30 20 32 30 30 20 4f 4b 0d 0a|";
    content:"|43 6f 6e 74 65 6e 74 2d 4c 65 6e 67 74 68 3a 20 31 0d 0a|";
    content:"|43 6f 6e 65 63 74 69 6f 6e 3a 20 4b 65 65 70 2d 41 6c 69 76 65 0d 0a|";
    content:"|53 65 74 2d 43 6f 6f 6b 69 65 3a|";
    content:"|0d 0a 20 31|";
    classtype:targeted-activity;
    sid:2016477; rev:3;
    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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