ET MALWARE Plead TSCookie CnC Checkin M4

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".jsp?m="; startswith;
pcre:"/^[A-F0-9]+$/R";
http.user_agent;
content:"Mozilla/4.0|20 28|compatible|3b 20|MSIE|20|8.0|3b 20|Win32|29|"; fast_pattern;
http.request_body;
pcre:"/^[\x20-\x7e\r\n]{0,13}[^\x20-\x7e\r\n]/si";
http.accept;
content:"*/*";
http.header_names;
content:!"Referer";
Raw source ET MALWARE Plead TSCookie CnC Checkin M4 · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Plead TSCookie CnC Checkin M4";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".jsp?m="; startswith;
    pcre:"/^[A-F0-9]+$/R";
    http.user_agent;
    content:"Mozilla/4.0|20 28|compatible|3b 20|MSIE|20|8.0|3b 20|Win32|29|"; fast_pattern;
    http.request_body;
    pcre:"/^[\x20-\x7e\r\n]{0,13}[^\x20-\x7e\r\n]/si";
    http.accept;
    content:"*/*";
    http.header_names;
    content:!"Referer";
    reference:url,blogs.jpcert.or.jp/en/2019/09/tscookie-loader.html;
    classtype:command-and-control;
    sid:2028602; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_09_18, deployment Perimeter, malware_family TScookie, performance_impact Low, confidence High, signature_severity Major, tag BlackTech, tag Plead, updated_at 2020_09_02;
)

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