ET MALWARE W32/Badspace.Backdoor CnC Activity (POST)

Query · suricata

flow:established,to_server;
urilen:1;
http.method;
content:"POST";
http.uri;
content:"|2f|";
http.user_agent;
content:"Mozilla|20 2f 20|"; startswith; fast_pattern;
content:"MSIE|20|6|2e|0|3b 20|Windows|20|NT|20|5|2e|1|3b 20|SV1|3b|"; distance:0;
http.cookie; bsize:>100;
pcre:"/^(?:[A-Za-z0-9\x2b\x2f\x3d]){100,}$/";
Raw source ET MALWARE W32/Badspace.Backdoor CnC Activity (POST) · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE W32/Badspace.Backdoor CnC Activity (POST)";
    flow:established,to_server;
    urilen:1;
    http.method;
    content:"POST";
    http.uri;
    content:"|2f|";
    http.user_agent;
    content:"Mozilla|20 2f 20|"; startswith; fast_pattern;
    content:"MSIE|20|6|2e|0|3b 20|Windows|20|NT|20|5|2e|1|3b 20|SV1|3b|"; distance:0;
    http.cookie; bsize:>100;
    pcre:"/^(?:[A-Za-z0-9\x2b\x2f\x3d]){100,}$/";
    classtype:trojan-activity;
    sid:2052558; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2024_05_13, deployment Perimeter, confidence High, signature_severity Major, tag c2, updated_at 2024_08_19, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
)

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