ET MALWARE Win32/Blacktech Plead CnC Activity (POST)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".aspx?m="; fast_pattern;
pcre:"/^[0-9]{10}$/R";
http.user_agent;
content:"Mozilla/4.0|20|(compatible|3b 20|MSIE|20|8.0|3b 20|Win32)"; bsize:41;
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET MALWARE Win32/Blacktech Plead 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Blacktech Plead CnC Activity (POST)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".aspx?m="; fast_pattern;
    pcre:"/^[0-9]{10}$/R";
    http.user_agent;
    content:"Mozilla/4.0|20|(compatible|3b 20|MSIE|20|8.0|3b 20|Win32)"; bsize:41;
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:url,twitter.com/GlobalNTT_JP/status/1517061187107946496;
    classtype:trojan-activity;
    sid:2036315; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_04_22, deployment Perimeter, malware_family BlackTech, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_22;
)

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