ET MALWARE Cobalt Strike Malleable C2 JQuery Custom Profile Response


Query · suricata

flow:established,to_client;
file.data;
content:"/*!|20|jQuery|20|v"; startswith;
content:"if|28|e|5b|n|5d 3d 3d 3d|t|29|return n|3b|return|2d|1|7d 2c|P|3d 22|"; fast_pattern; distance:0;
content:!"checked"; within:7;
Raw source ET MALWARE Cobalt Strike Malleable C2 JQuery Custom Profile Response · 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 any -> $HOME_NET any (
    msg:"ET MALWARE Cobalt Strike Malleable C2 JQuery Custom Profile Response";
    flow:established,to_client;
    file.data;
    content:"/*!|20|jQuery|20|v"; startswith;
    content:"if|28|e|5b|n|5d 3d 3d 3d|t|29|return n|3b|return|2d|1|7d 2c|P|3d 22|"; fast_pattern; distance:0;
    content:!"checked"; within:7;
    reference:md5,09773b90da8f3688faf54750b6a5ecf5;
    classtype:command-and-control;
    sid:2033009; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_05_21, deployment Perimeter, malware_family Cobalt_Strike, confidence Medium, signature_severity Major, updated_at 2021_05_21, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation;
)

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