ET ADWARE_PUP W32/Stan Malvertising.Dropper CnC Beacon

Query · suricata

flow:established,to_server;
urilen:>50;
http.method;
content:"GET";
http.uri;
pcre:"/^\/[a-f0-9]{50,}$/";
http.header;
content:"Proxy-Authorization|3a 20|Basic";
http.host;
content:"stan|2E|"; fast_pattern; startswith;
http.header_names;
content:!"Accept-";
content:!"Referer|0d 0a|";
Raw source ET ADWARE_PUP W32/Stan Malvertising.Dropper 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 -> $EXTERNAL_NET any (
    msg:"ET ADWARE_PUP W32/Stan Malvertising.Dropper CnC Beacon";
    flow:established,to_server;
    urilen:>50;
    http.method;
    content:"GET";
    http.uri;
    pcre:"/^\/[a-f0-9]{50,}$/";
    http.header;
    content:"Proxy-Authorization|3a 20|Basic";
    http.host;
    content:"stan|2E|"; fast_pattern; startswith;
    http.header_names;
    content:!"Accept-";
    content:!"Referer|0d 0a|";
    reference:url,blogs.cisco.com/security/kyle-and-stan/;
    classtype:pup-activity;
    sid:2019145; rev:5;
    metadata:attack_target Client_Endpoint, created_at 2014_09_10, deployment Perimeter, signature_severity Minor, tag c2, updated_at 2020_10_12, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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