ET MALWARE W32/Symmi.46846 CnC Beacon

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/notify.php"; fast_pattern;
http.user_agent;
content:"Mozilla/4.0 (compatible|3b 20|MyApp)"; startswith;
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET MALWARE W32/Symmi.46846 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 W32/Symmi.46846 CnC Beacon";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/notify.php"; fast_pattern;
    http.user_agent;
    content:"Mozilla/4.0 (compatible|3b 20|MyApp)"; startswith;
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:md5,fe5dc2a4ee8aa084c9da42cd2d1ded2e;
    classtype:command-and-control;
    sid:2019948; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2014_12_16, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_09_28, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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