ET MALWARE Vawtrak HTTP CnC Beacon

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.cookie;
content:"PHPSESSID="; depth:10; fast_pattern;
pcre:"/^[A-F0-9]{32}$/R";
http.request_body;
pcre:"/^[\x20-\x7e\r\n]{0,20}[^\x20-\x7e\r\n]/";
http.content_type;
content:"application/octet-stream"; depth:24; endswith;
http.header_names;
content:!"IBM-PROXY-WTE"; nocase;
Raw source ET MALWARE Vawtrak HTTP CnC Beacon · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Vawtrak HTTP CnC Beacon";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.cookie;
    content:"PHPSESSID="; depth:10; fast_pattern;
    pcre:"/^[A-F0-9]{32}$/R";
    http.request_body;
    pcre:"/^[\x20-\x7e\r\n]{0,20}[^\x20-\x7e\r\n]/";
    http.content_type;
    content:"application/octet-stream"; depth:24; endswith;
    http.header_names;
    content:!"IBM-PROXY-WTE"; nocase;
    classtype:command-and-control;
    sid:2022225; rev:11;
    metadata:attack_target Client_Endpoint, created_at 2015_12_08, deployment Perimeter, performance_impact Significant, signature_severity Major, tag c2, updated_at 2024_05_01, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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