ET MALWARE Operation Buhtrap CnC Beacon 2

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/menu.php"; fast_pattern; endswith;
http.user_agent;
content:"rv|3a|20.0";
content:"Firefox/20.0"; distance:0;
http.request_body;
pcre:"/^[\x20-\x7e\r\n]{0,20}[^\x20-\x7e\r\n]/";
http.content_type;
content:"application/octet-stream"; bsize:24;
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET MALWARE Operation Buhtrap 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 Operation Buhtrap CnC Beacon 2";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/menu.php"; fast_pattern; endswith;
    http.user_agent;
    content:"rv|3a|20.0";
    content:"Firefox/20.0"; distance:0;
    http.request_body;
    pcre:"/^[\x20-\x7e\r\n]{0,20}[^\x20-\x7e\r\n]/";
    http.content_type;
    content:"application/octet-stream"; bsize:24;
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:url,welivesecurity.com/2015/04/09/operation-buhtrap/;
    reference:md5,24fac66b3a6d55a83e1309bc530b032e;
    classtype:command-and-control;
    sid:2020891; rev:6;
    metadata:attack_target Client_Endpoint, created_at 2015_04_11, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_10_05, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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