ET MALWARE Cobalt Strike Malleable C2 Profile (btn_bg)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/btn_bg";
http.request_body;
content:"paper="; startswith;
Raw source ET MALWARE Cobalt Strike Malleable C2 Profile (btn_bg) · 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 $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Cobalt Strike Malleable C2 Profile (btn_bg)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/btn_bg";
    http.request_body;
    content:"paper="; startswith;
    reference:url,twitter.com/Unit42_Intel/status/1387149833274810368;
    reference:url,github.com/pan-unit42/tweets/blob/master/2021-04-26-IcedID-with-Cobalt-Strike-IOCs.txt;
    classtype:command-and-control;
    sid:2032964; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_05_17, deployment Perimeter, malware_family Cobalt_Strike, confidence Medium, signature_severity Major, updated_at 2021_05_17, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation;
)

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