ET MALWARE BadSpace/WarmCookie CnC Activity (GET) M2

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri; bsize:1;
content:"|2f|";
http.user_agent; bsize:79;
content:"Mozilla|2f|5.0|20 28|Windows NT 6.1|3b 20|Win64|3b 20|x64|3b 20|rv|3a|109.0|29 20|Gecko|2f|20100101 Firefox|2f|115.0"; fast_pattern;
http.cookie; bsize:>100;
pcre:"/^(?:[A-Za-z0-9\x2b\x2f\x3d]){100,}$/";
target:src_ip;
Raw source ET MALWARE BadSpace/WarmCookie CnC Activity (GET) M2 · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE BadSpace/WarmCookie CnC Activity (GET) M2";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri; bsize:1;
    content:"|2f|";
    http.user_agent; bsize:79;
    content:"Mozilla|2f|5.0|20 28|Windows NT 6.1|3b 20|Win64|3b 20|x64|3b 20|rv|3a|109.0|29 20|Gecko|2f|20100101 Firefox|2f|115.0"; fast_pattern;
    http.cookie; bsize:>100;
    pcre:"/^(?:[A-Za-z0-9\x2b\x2f\x3d]){100,}$/";
    reference:md5,20274d8185a2c83ee2d05ddb4ca6fe66;
    classtype:trojan-activity;
    sid:2056103; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_09_24, deployment Perimeter, deployment SSLDecrypt, malware_family WARMCOOKIE, performance_impact Low, confidence High, signature_severity Major, tag c2, updated_at 2024_09_24, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
    target:src_ip;
)

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