ET MALWARE BlackTech/PLEAD TSCookie CnC Checkin M1

Query · suricata

flow:established,to_server;
threshold:type both, count 1, seconds 30, track by_dst;
http.method;
content:"GET";
http.uri;
content:".aspx";
http.user_agent;
content:"Mozilla/4.0 |28|compatible|3b 20|MSIE 8.0|3b 20|Win32|29|"; fast_pattern;
http.cookie;
pcre:"/^[A-F0-9]{50,}$/";
http.header_names;
content:"Date";
content:"Connection";
content:"Pragma";
content:"Cache-Control";
Raw source ET MALWARE BlackTech/PLEAD TSCookie CnC Checkin M1 · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE BlackTech/PLEAD TSCookie CnC Checkin M1";
    flow:established,to_server;
    threshold:type both, count 1, seconds 30, track by_dst;
    http.method;
    content:"GET";
    http.uri;
    content:".aspx";
    http.user_agent;
    content:"Mozilla/4.0 |28|compatible|3b 20|MSIE 8.0|3b 20|Win32|29|"; fast_pattern;
    http.cookie;
    pcre:"/^[A-F0-9]{50,}$/";
    http.header_names;
    content:"Date";
    content:"Connection";
    content:"Pragma";
    content:"Cache-Control";
    reference:url,blog.jpcert.or.jp/2018/03/malware-tscooki-7aa0.html;
    classtype:command-and-control;
    sid:2026565; rev:5;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_03_06, deployment Perimeter, malware_family TScookie, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_08_27;
)

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