ET MALWARE H1N1 Loader CnC Beacon M1

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/gate.php"; fast_pattern; endswith;
http.header;
content:"Accept|3a 20|*/*|0d 0a|accept-Encoding|3a 20|none|0d 0a|accept-Language|3a 20|"; depth:53;
http.request_body;
pcre:"/^[A-Za-z0-9/_]+={0,2}$/";
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET MALWARE H1N1 Loader CnC Beacon M1 · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE H1N1 Loader CnC Beacon M1";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/gate.php"; fast_pattern; endswith;
    http.header;
    content:"Accept|3a 20|*/*|0d 0a|accept-Encoding|3a 20|none|0d 0a|accept-Language|3a 20|"; depth:53;
    http.request_body;
    pcre:"/^[A-Za-z0-9/_]+={0,2}$/";
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:url,kernelmode.info/forum/viewtopic.php?f=16&t=3851;
    classtype:command-and-control;
    sid:2021139; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2015_05_22, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_10_01, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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