ET MALWARE W32/Waterspout.APT Backdoor CnC Beacon

Query · suricata

flow:to_server,established;
http.method;
content:"GET";
http.uri;
content:".php?";
content:"_id="; distance:3; within:4; fast_pattern;
pcre:"/\/\d{5}\/(?P<s1>[a-z]{3})[a-z]\.php\?(?P=s1)_id=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/";
Raw source ET MALWARE W32/Waterspout.APT Backdoor 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE W32/Waterspout.APT Backdoor CnC Beacon";
    flow:to_server,established;
    http.method;
    content:"GET";
    http.uri;
    content:".php?";
    content:"_id="; distance:3; within:4; fast_pattern;
    pcre:"/\/\d{5}\/(?P<s1>[a-z]{3})[a-z]\.php\?(?P=s1)_id=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/";
    reference:url,www.fireeye.com/blog/technical/botnet-activities-research/2014/09/darwins-favorite-apt-group-2.html;
    classtype:targeted-activity;
    sid:2019115; rev:6;
    metadata:attack_target Client_Endpoint, created_at 2014_09_05, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_05_28, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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