ET MALWARE Bookworm CnC Beacon 2

Query · suricata

flow:to_server,established;
http.method;
content:"POST";
http.uri;
content:"000"; fast_pattern;
pcre:"/^\/[a-f0-9]+000[a-f0-9]{37}$/i";
http.header_names;
content:!"Accept";
content:!"Referer|0d 0a|";
content:!"User-Agent|0d 0a|";
Raw source ET MALWARE Bookworm CnC Beacon 2 · Suricata
Esc
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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Bookworm CnC Beacon 2";
    flow:to_server,established;
    http.method;
    content:"POST";
    http.uri;
    content:"000"; fast_pattern;
    pcre:"/^\/[a-f0-9]+000[a-f0-9]{37}$/i";
    http.header_names;
    content:!"Accept";
    content:!"Referer|0d 0a|";
    content:!"User-Agent|0d 0a|";
    reference:md5,0f41c853a2d522e326f2c30b4b951b04;
    reference:url,researchcenter.paloaltonetworks.com/2015/11/bookworm-trojan-a-model-of-modular-architecture/;
    classtype:command-and-control;
    sid:2022074; rev:5;
    metadata:attack_target Client_Endpoint, created_at 2015_11_11, deployment Perimeter, performance_impact Significant, signature_severity Major, tag c2, updated_at 2024_04_29, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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