ET MALWARE Win32/Unk.VBScript Requesting Instruction from CnC

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/open?topics=s9"; fast_pattern; depth:15;
pcre:"/^[0-9]{3}$/R";
http.header_names;
content:!"Referer";
Raw source ET MALWARE Win32/Unk.VBScript Requesting Instruction from CnC · Suricata
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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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Unk.VBScript Requesting Instruction from CnC";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/open?topics=s9"; fast_pattern; depth:15;
    pcre:"/^[0-9]{3}$/R";
    http.header_names;
    content:!"Referer";
    reference:md5,7489fb981cd054c665e442dfea8ef203;
    reference:url,blogs.jpcert.or.jp/en/2019/07/spear-phishing-against-cryptocurrency-businesses.html;
    classtype:command-and-control;
    sid:2027698; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_07_10, deployment Perimeter, malware_family Win32_Unk_VBScript, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2020_08_31;
)

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